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bors df8ac8f1d7 Auto merge of #122568 - RalfJung:mentioned-items, r=oli-obk 
recursively evaluate the constants in everything that is 'mentioned'

This is another attempt at fixing https://github.com/rust-lang/rust/issues/107503. The previous attempt at https://github.com/rust-lang/rust/pull/112879 seems stuck in figuring out where the [perf regression](https://perf.rust-lang.org/compare.html?start=c55d1ee8d4e3162187214692229a63c2cc5e0f31&end=ec8de1ebe0d698b109beeaaac83e60f4ef8bb7d1&stat=instructions:u) comes from. In  https://github.com/rust-lang/rust/pull/122258 I learned some things, which informed the approach this PR is taking.

Quoting from the new collector docs, which explain the high-level idea:
```rust
//! One important role of collection is to evaluate all constants that are used by all the items
//! which are being collected. Codegen can then rely on only encountering constants that evaluate
//! successfully, and if a constant fails to evaluate, the collector has much better context to be
//! able to show where this constant comes up.
//!
//! However, the exact set of "used" items (collected as described above), and therefore the exact
//! set of used constants, can depend on optimizations. Optimizing away dead code may optimize away
//! a function call that uses a failing constant, so an unoptimized build may fail where an
//! optimized build succeeds. This is undesirable.
//!
//! To fix this, the collector has the concept of "mentioned" items. Some time during the MIR
//! pipeline, before any optimization-level-dependent optimizations, we compute a list of all items
//! that syntactically appear in the code. These are considered "mentioned", and even if they are in
//! dead code and get optimized away (which makes them no longer "used"), they are still
//! "mentioned". For every used item, the collector ensures that all mentioned items, recursively,
//! do not use a failing constant. This is reflected via the [`CollectionMode`], which determines
//! whether we are visiting a used item or merely a mentioned item.
//!
//! The collector and "mentioned items" gathering (which lives in `rustc_mir_transform::mentioned_items`)
//! need to stay in sync in the following sense:
//!
//! - For every item that the collector gather that could eventually lead to build failure (most
//!   likely due to containing a constant that fails to evaluate), a corresponding mentioned item
//!   must be added. This should use the exact same strategy as the ecollector to make sure they are
//!   in sync. However, while the collector works on monomorphized types, mentioned items are
//!   collected on generic MIR -- so any time the collector checks for a particular type (such as
//!   `ty::FnDef`), we have to just onconditionally add this as a mentioned item.
//! - In `visit_mentioned_item`, we then do with that mentioned item exactly what the collector
//!   would have done during regular MIR visiting. Basically you can think of the collector having
//!   two stages, a pre-monomorphization stage and a post-monomorphization stage (usually quite
//!   literally separated by a call to `self.monomorphize`); the pre-monomorphizationn stage is
//!   duplicated in mentioned items gathering and the post-monomorphization stage is duplicated in
//!   `visit_mentioned_item`.
//! - Finally, as a performance optimization, the collector should fill `used_mentioned_item` during
//!   its MIR traversal with exactly what mentioned item gathering would have added in the same
//!   situation. This detects mentioned items that have *not* been optimized away and hence don't
//!   need a dedicated traversal.

enum CollectionMode {
    /// Collect items that are used, i.e., actually needed for codegen.
    ///
    /// Which items are used can depend on optimization levels, as MIR optimizations can remove
    /// uses.
    UsedItems,
    /// Collect items that are mentioned. The goal of this mode is that it is independent of
    /// optimizations: the set of "mentioned" items is computed before optimizations are run.
    ///
    /// The exact contents of this set are *not* a stable guarantee. (For instance, it is currently
    /// computed after drop-elaboration. If we ever do some optimizations even in debug builds, we
    /// might decide to run them before computing mentioned items.) The key property of this set is
    /// that it is optimization-independent.
    MentionedItems,
}
```
And the `mentioned_items` MIR body field docs:
```rust
    /// Further items that were mentioned in this function and hence *may* become monomorphized,
    /// depending on optimizations. We use this to avoid optimization-dependent compile errors: the
    /// collector recursively traverses all "mentioned" items and evaluates all their
    /// `required_consts`.
    ///
    /// This is *not* soundness-critical and the contents of this list are *not* a stable guarantee.
    /// All that's relevant is that this set is optimization-level-independent, and that it includes
    /// everything that the collector would consider "used". (For example, we currently compute this
    /// set after drop elaboration, so some drop calls that can never be reached are not considered
    /// "mentioned".) See the documentation of `CollectionMode` in
    /// `compiler/rustc_monomorphize/src/collector.rs` for more context.
    pub mentioned_items: Vec<Spanned<MentionedItem<'tcx>>>,
```

Fixes #107503
2024-03-21 09:01:18 +00:00
..
abi
Auto merge of #121282 - saethlin:gep-null-means-no-provenance, r=scottmcm
2024-03-12 04:11:37 +00:00
alloc-error
Update test directives for wasm32-wasip1
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allocator
Update test directives for wasm32-wasip1
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annotate-snippet
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anon-params
macro_rules: Preserve all metavariable spans in a global side table
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argfile
Make arg_expand_all not short-circuit on first error
2024-03-07 00:19:55 +00:00
argument-suggestions
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array-slice-vec
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asm
Update test with //@ needs-asm-support
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associated-consts
Bless test fallout (duplicate diagnostics)
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associated-inherent-types
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associated-item
Deduplicate some logic and reword output
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associated-type-bounds
Bless test fallout (duplicate diagnostics)
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associated-types
Auto merge of #122392 - BoxyUwU:misc_cleanup, r=lcnr
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async-await
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
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attributes
Rollup merge of #121545 - gvozdvmozgu:fix-attribute-validation-associated-items, r=fmease
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auto-traits
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autoref-autoderef
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auxiliary
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bench
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binding
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binop
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
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blind
Show number in error message even for one error
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block-result
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borrowck
Bless test fallout (duplicate diagnostics)
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box
compiletest: Add a //@ needs-threads directive
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btreemap
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c-variadic
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cast
add test for casting pointer to union with unsized tail
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cfg
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check-cfg
Auto merge of #119199 - dpaoliello:arm64ec, r=petrochenkov
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closure_context
Show number in error message even for one error
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closure-expected-type
Make nll higher ranked equate use bidirectional subtyping in invariant context
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closures
eagerly instantiate binders to avoid relying on sub
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cmse-nonsecure
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codegen
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codemap_tests
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coercion
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coherence
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coinduction
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command
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compare-method
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compiletest-self-test
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conditional-compilation
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confuse-field-and-method
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const_prop
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const-generics
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const-ptr
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consts
Auto merge of #122568 - RalfJung:mentioned-items, r=oli-obk
2024-03-21 09:01:18 +00:00
coroutine
Remove redundant coroutine captures note
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crate-loading
Make not finding core a fatal error
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cross
Provide structured suggestion for #![feature(foo)]
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cross-crate
Test and implement reachability for trait objects and generic parameters of functions
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custom_test_frameworks
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cycle-trait
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debuginfo
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definition-reachable
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delegation
Delegation: fix ICE on duplicated associative items
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dep-graph
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deployment-target
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deprecation
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deref-patterns
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derived-errors
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derives
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deriving
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dest-prop
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destructuring-assignment
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diagnostic_namespace
Ungate the UNKNOWN_OR_MALFORMED_DIAGNOSTIC_ATTRIBUTES lint
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diagnostic-flags
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diagnostic-width
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did_you_mean
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directory_ownership
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disallowed-deconstructing
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drop
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dropck
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dst
review comment: change wording
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duplicate
Update test directives for wasm32-wasip1
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dyn-drop
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dyn-keyword
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dyn-star
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dynamically-sized-types
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editions
macro_rules: Preserve all metavariable spans in a global side table
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empty
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entry-point
Stabilize imported_main
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enum
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enum-discriminant
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env-macro
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error-codes
make type_flags(ReError) & HAS_ERROR
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error-emitter
On tests that specify --color=always emit SVG file with stderr output
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errors
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explicit
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explicit-tail-calls
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
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expr
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
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extern
Update test directives for wasm32-wasip1
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extern-flag
resolve: Scale back unloading of speculatively loaded crates
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feature-gates
Auto merge of #122055 - compiler-errors:stabilize-atb, r=oli-obk
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fmt
Rollup merge of #122556 - jieyouxu:non-identifier-format-arg, r=petrochenkov
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fn
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for
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for-loop-while
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foreign
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fully-qualified-type
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function-pointer
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functions-closures
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generic-associated-types
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
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generic-const-items
Provide structured suggestion for #![feature(foo)]
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generics
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half-open-range-patterns
Remove MaybeInfiniteInt::JustAfterMax
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hashmap
compiletest: Add a //@ needs-threads directive
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hello_world
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higher-ranked
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hygiene
RawVec::into_box: avoid unnecessary intermediate reference
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illegal-sized-bound
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impl-trait
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implied-bounds
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imports
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include-macros
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indexing
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inference
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infinite
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inherent-impls-overlap-check
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inline-const
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instrument-coverage
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interior-mutability
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internal
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intrinsics
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invalid
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invalid-self-argument
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io-checks
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issues
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
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iterators
Be more lax in .into_iter() suggestion when encountering Iterator methods on non-Iterator
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json
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keyword
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kindck
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
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label
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lang-items
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late-bound-lifetimes
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layout
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lazy-type-alias
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lexer
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lifetimes
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limits
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linkage-attr
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lint
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liveness
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loops
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lowering
Overhaul how stashed diagnostics work, again.
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lto
compiletest: Add a //@ needs-threads directive
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lub-glb
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macro_backtrace
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macros
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malformed
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manual
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marker_trait_attr
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match
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meta
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methods
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mir
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mir-dataflow
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mismatched_types
eagerly instantiate binders to avoid relying on sub
2024-03-14 17:19:40 +01:00
missing
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
missing_non_modrs_mod
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
missing-trait-bounds
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
modules
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
modules_and_files_visibility
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
moves
Add HELP to test
2024-03-17 21:45:03 +00:00
mut
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
namespace
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
native-library-link-flags
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
never_type
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
nll
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
2024-03-21 06:12:24 +00:00
no_std
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
non_modrs_mods
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
non_modrs_mods_and_inline_mods
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
not-panic
Provide more context on derived obligation error primary label
2024-01-30 21:28:18 +00:00
numbers-arithmetic
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
numeric
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
object-lifetime
make type_flags(ReError) & HAS_ERROR
2024-03-20 17:29:58 +00:00
object-safety
Ignore tests w/ current/next revisions from compare-mode=next-solver
2024-03-10 21:18:41 -04:00
obsolete-in-place
…
offset-of
When displaying multispans, ignore empty lines adjacent to ...
2024-03-18 16:25:36 +00:00
on-unimplemented
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
operator-recovery
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
or-patterns
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
overloaded
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
packed
Allow newly added non_local_definitions lint in tests
2024-02-17 13:59:45 +01:00
panic-handler
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
panic-runtime
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
panics
Auto merge of #122036 - alexcrichton:test-wasm-with-wasi, r=oli-obk
2024-03-12 00:03:54 +00:00
parallel-rustc
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
parser
Rollup merge of #122717 - workingjubilee:handle-call-call-call-call-calling-me-maybe, r=compiler-errors
2024-03-19 18:03:52 +01:00
pattern
Fix incorrect mutable suggestion information for binding in ref pattern.
2024-03-19 12:28:23 +08:00
pin-macro
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
polymorphization
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
precondition-checks
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
print_type_sizes
Move generic NonZero rustc_layout_scalar_valid_range_start attribute to inner type.
2024-03-10 13:18:07 +01:00
print-fuel
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
privacy
When displaying multispans, ignore empty lines adjacent to ...
2024-03-18 16:25:36 +00:00
proc-macro
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
process
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
process-termination
compiletest: Add a //@ needs-threads directive
2024-03-06 12:35:07 -08:00
ptr_ops
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
pub
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
qualified
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
query-system
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
range
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
raw-ref-op
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
reachable
Rollup merge of #120742 - Nadrieril:use-min_exh_pats, r=compiler-errors
2024-02-23 17:02:03 +01:00
recursion
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
recursion_limit
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
regions
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
2024-03-11 21:28:16 +00:00
repeat-expr
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
repr
Auto merge of #121900 - chenyukang:yukang-fix-121425-repr-pack-error, r=compiler-errors
2024-03-04 05:32:26 +00:00
reserved
Supress unhelpful diagnostics for unresolved top level attributes
2024-01-29 17:43:07 +08:00
resolve
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
return
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
rfcs
Bless test fallout (duplicate diagnostics)
2024-03-20 13:00:34 -04:00
rmeta
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
runtime
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
rust-2018
Detect unused struct impls pub trait
2024-03-10 23:30:53 +08:00
rust-2021
Deduplicate some logic and reword output
2024-02-22 18:05:28 +00:00
rust-2024
Add Future and IntoFuture to the 2024 prelude
2024-02-18 23:20:05 +01:00
rustdoc
Update ui tests
2024-02-29 14:43:43 +01:00
sanitizer
Add initial support for DataFlowSanitizer
2024-03-01 18:50:40 -08:00
self
Deduplicate some logic and reword output
2024-02-22 18:05:28 +00:00
sepcomp
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
shadowed
Tweak wording of "implemented trait isn't imported" suggestion
2024-02-22 18:05:27 +00:00
shell-argfiles
Make arg_expand_all not short-circuit on first error
2024-03-07 00:19:55 +00:00
simd
preserve span when evaluating mir::ConstOperand
2024-03-14 21:55:07 +01:00
single-use-lifetime
Add test to check unused_lifetimes don't duplicate "parameter is never used" error
2024-03-09 18:24:45 +00:00
sized
Silence unecessary !Sized binding error
2024-03-19 21:26:11 +00:00
span
Merge collect_mod_item_types query into check_well_formed
2024-03-07 14:26:31 +00:00
specialization
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
stability-attribute
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
stable-mir-print
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
stack-protector
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
static
Move tests
2024-03-03 16:30:48 -03:00
statics
Ensure nested allocations in statics do not get deduplicated
2024-03-12 05:53:46 +00:00
stats
Update tests/ui/stats/hir-stats.stderr output
2024-03-14 12:42:04 +01:00
std
Move tests
2024-03-03 16:30:48 -03:00
stdlib-unit-tests
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
str
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
structs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
structs-enums
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
suggestions
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
2024-03-21 06:12:24 +00:00
svh
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
symbol-mangling-version
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
symbol-names
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
sync
Provide more context on derived obligation error primary label
2024-01-30 21:28:18 +00:00
target-feature
Merge collect_mod_item_types query into check_well_formed
2024-03-07 14:26:31 +00:00
test-attrs
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
thir-print
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
thread-local
compiletest: Add a //@ needs-threads directive
2024-03-06 12:35:07 -08:00
threads-sendsync
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
tool-attributes
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
track-diagnostics
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
trait-bounds
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
traits
Auto merge of #121123 - compiler-errors:item-assumptions, r=oli-obk
2024-03-21 06:12:24 +00:00
transmutability
Safe Transmute: lowercase diagnostics
2024-03-15 17:55:49 +00:00
transmute
safe transmute: revise safety analysis
2024-02-27 16:22:32 +00:00
treat-err-as-bug
Always evaluate free constants and statics, even if previous errors occurred
2024-02-19 22:11:13 +00:00
trivial-bounds
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
try-block
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
try-trait
Implement NonZero traits generically.
2024-02-17 21:58:56 +01:00
tuple
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
type
When displaying multispans, ignore empty lines adjacent to ...
2024-03-18 16:25:36 +00:00
type-alias
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
type-alias-enum-variants
Merge collect_mod_item_types query into check_well_formed
2024-03-07 14:26:31 +00:00
type-alias-impl-trait
register opaques that reference errors
2024-03-20 17:30:19 +00:00
type-inference
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
typeck
make type_flags(ReError) & HAS_ERROR
2024-03-20 17:29:58 +00:00
typeof
Already poison the type_of result of the anon const used in the typeof expression
2024-02-08 07:32:30 +00:00
ufcs
try_with_capacity for Vec, VecDeque, String
2024-03-01 18:24:02 +00:00
unboxed-closures
make type_flags(ReError) & HAS_ERROR
2024-03-20 17:29:58 +00:00
underscore-imports
Tweak wording of "implemented trait isn't imported" suggestion
2024-02-22 18:05:27 +00:00
underscore-lifetime
make type_flags(ReError) & HAS_ERROR
2024-03-20 17:29:58 +00:00
uniform-paths
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
uninhabited
Rollup merge of #120742 - Nadrieril:use-min_exh_pats, r=compiler-errors
2024-02-23 17:02:03 +01:00
union
hir_analysis: enums return None in find_field
2024-03-04 11:38:16 +00:00
unknown-unstable-lints
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unpretty
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unresolved
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unsafe
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unsized
Ignore tests w/ current/next revisions from compare-mode=next-solver
2024-03-10 21:18:41 -04:00
unsized-locals
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unused-crate-deps
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
unwind-abis
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
use
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
variance
Revert "Auto merge of #122140 - oli-obk:track_errors13, r=davidtwco"
2024-03-11 21:28:16 +00:00
variants
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
wasm
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
wf
make type_flags(ReError) & HAS_ERROR
2024-03-20 17:29:58 +00:00
where-clauses
update region debug formatting
2024-03-18 16:44:12 +00:00
while
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
xcrate
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
zero-sized
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
.gitattributes
…
alias-uninit-value.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
anonymous-higher-ranked-lifetime.rs
…
anonymous-higher-ranked-lifetime.stderr
Deduplicate more sized errors on call exprs
2024-01-24 02:53:15 +00:00
artificial-block.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
as-precedence.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
assign-assign.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
assign-imm-local-twice.rs
…
assign-imm-local-twice.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
assoc-lang-items.rs
…
assoc-lang-items.stderr
…
assoc-oddities-3.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
associated-path-shl.rs
…
associated-path-shl.stderr
…
atomic-from-mut-not-available.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
atomic-from-mut-not-available.stderr
fix test
2024-02-22 18:05:28 +00:00
attempted-access-non-fatal.rs
…
attempted-access-non-fatal.stderr
…
attr-bad-crate-attr.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
attr-bad-crate-attr.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
attr-shebang.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
attr-start.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
attr-usage-inline.rs
…
attr-usage-inline.stderr
…
attrs-resolution-errors.rs
…
attrs-resolution-errors.stderr
…
attrs-resolution.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
augmented-assignments-feature-gate-cross.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
augmented-assignments-rpass.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
augmented-assignments.rs
…
augmented-assignments.stderr
…
auto-instantiate.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
auto-ref-slice-plus-ref.rs
…
auto-ref-slice-plus-ref.stderr
Consider methods from traits when suggesting typos
2024-02-22 18:04:55 +00:00
autoderef-full-lval.rs
…
autoderef-full-lval.stderr
…
backtrace-apple-no-dsymutil.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
backtrace.rs
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
bare-fn-implements-fn-mut.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bare-static-string.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
big-literals.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bind-by-move.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bitwise.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bogus-tag.rs
…
bogus-tag.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
borrow-by-val-method-receiver.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
bounds-lifetime.rs
Simple modification of diagnostic information
2023-12-21 10:17:11 +08:00
bounds-lifetime.stderr
Bless tests
2024-01-13 12:46:58 -05:00
break-diverging-value.rs
…
break-diverging-value.stderr
…
builtin-clone-unwind.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
by-move-pattern-binding.rs
…
by-move-pattern-binding.stderr
…
can-copy-pod.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cancel-clean-via-immediate-rvalue-ref.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cannot-mutate-captured-non-mut-var.rs
…
cannot-mutate-captured-non-mut-var.stderr
…
capture1.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
capture1.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
catch-unwind-bang.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cenum_impl_drop_cast.rs
…
cenum_impl_drop_cast.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
cfguard-run.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
char.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
check-static-immutable-mut-slices.rs
…
check-static-immutable-mut-slices.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
check-static-recursion-foreign.rs
Update test directives for wasm32-wasip1
2024-03-11 09:36:35 -07:00
check-static-values-constraints.rs
…
check-static-values-constraints.stderr
Provide structured suggestion for #![feature(foo)]
2024-03-18 16:08:58 +00:00
class-cast-to-trait.rs
Continue to borrowck even if there were previous errors
2024-02-08 08:10:43 +00:00
class-cast-to-trait.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
class-method-missing.rs
…
class-method-missing.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
cleanup-rvalue-for-scope.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cleanup-rvalue-scopes-cf.rs
…
cleanup-rvalue-scopes-cf.stderr
…
cleanup-rvalue-scopes.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cleanup-rvalue-temp-during-incomplete-alloc.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
cleanup-shortcircuit.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
close-over-big-then-small-data.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
command-line-diagnostics.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
command-line-diagnostics.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
compile_error_macro.rs
…
compile_error_macro.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
complex.rs
[AUTO-GENERATED] Migrate ui tests from // to //@ directives
2024-02-16 20:02:50 +00:00
conflicting-repr-hints.rs
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conflicting-repr-hints.stderr
…
conservative_impl_trait.rs
…
conservative_impl_trait.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
constructor-lifetime-args.rs
…
constructor-lifetime-args.stderr
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copy-a-resource.rs
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copy-a-resource.stderr
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crate-leading-sep.rs
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crate-method-reexport-grrrrrrr.rs
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crate-name-attr-used.rs
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crate-name-mismatch.rs
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crate-name-mismatch.stderr
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custom_attribute.rs
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custom_attribute.stderr
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custom-attribute-multisegment.rs
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custom-attribute-multisegment.stderr
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custom-test-frameworks-simple.rs
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deduplicate-diagnostics.deduplicate.stderr
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deduplicate-diagnostics.duplicate.stderr
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deduplicate-diagnostics.rs
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deep.rs
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default-method-parsing.rs
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default-method-simple.rs
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defaults-well-formedness.rs
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deprecation-in-force-unstable.rs
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deref-non-pointer.rs
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deref-rc.rs
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deref.rs
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derive-uninhabited-enum-38885.rs
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derive-uninhabited-enum-38885.stderr
Adjust compiler tests for unused_tuple_struct_fields -> dead_code
2024-01-02 15:34:37 -05:00
destructure-trait-ref.rs
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destructure-trait-ref.stderr
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diverging-fallback-method-chain.rs
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diverging-fallback-option.rs
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diverging-fn-tail-35849.rs
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does-nothing.rs
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does-nothing.stderr
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dont-suggest-private-trait-method.rs
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double-ref.rs
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double-type-import.rs
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double-type-import.stderr
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2023-11-24 19:15:52 +01:00
dupe-first-attr.rs
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duplicate_entry_error.rs
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duplicate_entry_error.stderr
Collect lang items from AST
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early-ret-binop-add.rs
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elide-errors-on-mismatched-tuple.rs
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elided-test.rs
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elided-test.stderr
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else-if.rs
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empty_global_asm.rs
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empty-allocation-non-null.rs
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empty-allocation-rvalue-non-null.rs
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empty-type-parameter-list.rs
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2024-02-16 20:02:50 +00:00
empty-type-parameter-list.stderr
Update tests
2024-02-07 10:42:01 +08:00
env-args-reverse-iterator.rs
Update test directives for wasm32-wasip1
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env-funky-keys.rs
Update test directives for wasm32-wasip1
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env-null-vars.rs
Update test directives for wasm32-wasip1
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env-vars.rs
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2024-03-11 09:36:35 -07:00
error-festival.rs
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error-festival.stderr
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error-should-say-copy-not-pod.rs
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error-should-say-copy-not-pod.stderr
Detect when method call on argument could be removed to fulfill failed trait bound
2024-02-16 04:28:05 +00:00
exclusive-drop-and-copy.rs
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exclusive-drop-and-copy.stderr
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exec-env.rs
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2024-03-11 09:36:35 -07:00
explain.rs
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explain.stdout
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explicit-i-suffix.rs
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explore-issue-38412.rs
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explore-issue-38412.stderr
Bless tests
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expr-block-fn.rs
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expr-block-generic.rs
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expr-block.rs
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expr-copy.rs
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expr-if-generic.rs
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expr-if-panic-all.rs
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expr-scope.rs
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ext-expand-inner-exprs.rs
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ext-nonexistent.rs
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ext-nonexistent.stderr
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fact.rs
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fail-simple.rs
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fail-simple.stderr
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ffi_const2.rs
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ffi_const2.stderr
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ffi_const.rs
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ffi_const.stderr
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ffi_pure.rs
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ffi_pure.stderr
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filter-block-view-items.rs
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fn-in-pat.rs
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fn-in-pat.stderr
Show number in error message even for one error
2023-11-24 19:15:52 +01:00
foreign-fn-return-lifetime.rs
On borrow return type, suggest borrowing from arg or owned return type
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foreign-fn-return-lifetime.stderr
Rollup merge of #117914 - estebank:issue-85843, r=wesleywiser
2023-12-12 17:40:53 +01:00
format-no-std.rs
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fun-indirect-call.rs
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future-incompatible-lint-group.rs
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2024-02-29 14:43:43 +01:00
future-incompatible-lint-group.stderr
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global-scope.rs
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hello.rs
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illegal-ufcs-drop.fixed
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illegal-ufcs-drop.rs
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illegal-ufcs-drop.stderr
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impl-inherent-non-conflict.rs
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impl-not-adjacent-to-type.rs
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impl-privacy-xc-1.rs
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impl-unused-rps-in-assoc-type.rs
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impl-unused-tps-inherent.rs
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impl-unused-tps-inherent.stderr
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impl-unused-tps.rs
Merge impl_wf_inference into coherence checking
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impl-unused-tps.stderr
Merge check_mod_impl_wf and check_mod_type_wf
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implicit-method-bind.rs
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implicit-method-bind.stderr
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impossible_range.fixed
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impossible_range.rs
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impossible_range.stderr
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inc-range-pat.rs
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infer-fn-tail-expr.rs
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inherit-env.rs
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inline-disallow-on-variant.rs
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inline-disallow-on-variant.stderr
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inlined-main.rs
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inner-attrs-on-impl.rs
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inner-module.rs
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inner-static-type-parameter.rs
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inner-static-type-parameter.stderr
Rollup merge of #119939 - clubby789:static-const-generic-note, r=compiler-errors
2024-02-06 22:45:39 +01:00
inner-static.rs
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integral-indexing.rs
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integral-indexing.stderr
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integral-variable-unification-error.rs
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integral-variable-unification-error.stderr
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intrinsics-always-extern.rs
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intrinsics-always-extern.stderr
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invalid_crate_type_syntax.rs
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invalid_crate_type_syntax.stderr
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invalid_dispatch_from_dyn_impls.rs
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invalid_dispatch_from_dyn_impls.stderr
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issue-11881.rs
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issue-13560.rs
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issue-15924.rs
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issue-16822.rs
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issue-18502.rs
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issue-24106.rs
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issue-76387-llvm-miscompile.rs
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issues-71798.rs
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issues-71798.stderr
Use root obligation on E0277 for some cases
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item-name-overload.rs
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kinds-in-metadata.rs
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kinds-of-primitive-impl.rs
Continue compilation even if inherent impl checks fail
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kinds-of-primitive-impl.stderr
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lambda-infer-unresolved.rs
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last-use-in-block.rs
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last-use-in-cap-clause.rs
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last-use-is-capture.rs
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lazy-and-or.rs
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lexical-scopes.rs
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lexical-scoping.rs
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link-section.rs
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lint-group-denied-lint-allowed.rs
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lint-group-forbid-always-trumps-cli.rs
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lint-group-forbid-always-trumps-cli.stderr
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lint-unknown-lints-at-crate-level.rs
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list.rs
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log-err-phi.rs
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log-knows-the-names-of-variants.rs
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log-poly.rs
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logging-only-prints-once.rs
compiletest: Add a //@ needs-threads directive
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loud_ui.rs
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main-wrong-location.rs
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main-wrong-type.rs
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max-min-classes.rs
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maximal_mir_to_hir_coverage.rs
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maybe-bounds.rs
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maybe-bounds.stderr
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minus-string.rs
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minus-string.stderr
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missing_debug_impls.rs
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missing_debug_impls.stderr
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mod-subitem-as-enum-variant.rs
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mod-subitem-as-enum-variant.stderr
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module-macro_use-arguments.rs
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monomorphize-abi-alignment.rs
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msvc-data-only.rs
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multibyte.rs
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multiline-comment.rs
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mut-function-arguments.rs
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mutual-recursion-group.rs
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myriad-closures.rs
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nested-block-comment.rs
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nested-cfg-attrs.rs
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nested-cfg-attrs.stderr
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nested-class.rs
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nested-ty-params.rs
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nested-ty-params.stderr
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new-impl-syntax.rs
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new-import-syntax.rs
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new-style-constants.rs
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new-unicode-escapes.rs
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newlambdas.rs
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newtype-polymorphic.rs
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newtype.rs
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no_crate_type.rs
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no_crate_type.stderr
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no_send-enum.rs
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no_send-enum.stderr
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no_send-rc.rs
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no_share-enum.rs
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no_share-struct.rs
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no-capture-arc.rs
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no-capture-arc.stderr
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no-core-1.rs
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no-core-2.rs
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no-link-unknown-crate.rs
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no-patterns-in-args-2.rs
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no-patterns-in-args-macro.rs
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no-patterns-in-args.rs
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no-reuse-move-arc.rs
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no-send-res-ports.rs
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no-warn-on-field-replace-issue-34101.rs
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noexporttypeexe.rs
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noexporttypeexe.stderr
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non-constant-expr-for-arr-len.rs
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non-copyable-void.rs
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non-copyable-void.stderr
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non-fmt-panic.fixed
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non-fmt-panic.rs
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noncopyable-class.rs
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nonscalar-cast.fixed
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nonscalar-cast.rs
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nonscalar-cast.stderr
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not-clone-closure.rs
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not-copy-closure.rs
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not-enough-arguments.rs
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nul-characters.rs
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nullable-pointer-iotareduction.rs
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nullable-pointer-size.rs
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object-pointer-types.rs
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objects-coerce-freeze-borrored.rs
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occurs-check-2.rs
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occurs-check-2.stderr
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occurs-check-3.rs
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occurs-check-3.stderr
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occurs-check.rs
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occurs-check.stderr
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once-cant-call-twice-on-heap.rs
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oom_unwind.rs
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op-assign-builtins-by-ref.rs
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opeq.rs
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opt-in-copy.rs
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optimization-fuel-0.rs
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optimization-fuel-0.stderr
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optimization-fuel-1.rs
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optimization-fuel-1.stderr
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optimization-remark.rs
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order-dependent-cast-inference.rs
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orphan-check-diagnostics.rs
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orphan-check-diagnostics.stderr
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osx-frameworks.rs
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osx-frameworks.stderr
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out-pointer-aliasing.rs
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output-slot-variants.rs
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over-constrained-vregs.rs
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panic_implementation-closures.rs
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panic-while-printing.rs
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paren-span.rs
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partialeq_help.rs
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partialeq_help.stderr
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path-lookahead.fixed
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path-lookahead.rs
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path-lookahead.stderr
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path.rs
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paths-containing-nul.rs
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phantom-auto-trait.rs
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point-to-type-err-cause-on-impl-trait-return-2.rs
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pptypedef.rs
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primitive-binop-lhs-mut.rs
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print-stdout-eprint-stderr.rs
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project-cache-issue-31849.rs
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ptr-coercion-rpass.rs
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query-visibility.rs
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range_inclusive.rs
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raw-str.rs
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README.md
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realloc-16687.rs
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reassign-ref-mut.rs
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reexport-test-harness-main.rs
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reify-intrinsic.rs
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reify-intrinsic.stderr
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removing-extern-crate.fixed
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removing-extern-crate.rs
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removing-extern-crate.stderr
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resource-assign-is-not-copy.rs
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resource-destruct.rs
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ret-bang.rs
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ret-non-nil.rs
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ret-non-nil.stderr
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return-disjoint-regions.rs
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return-nil.rs
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rustc-error.rs
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rustc-rust-log.rs
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seq-args.rs
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seq-args.stderr
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shadow-bool.rs
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shadowed-use-visibility.rs
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short-error-format.rs
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short-error-format.stderr
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simple_global_asm.rs
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sized-borrowed-pointer.rs
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sized-cycle-note.rs
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sized-owned-pointer.rs
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sse2.rs
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stable-addr-of.rs
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std-backtrace.rs
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std-uncopyable-atomics.rs
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std-uncopyable-atomics.stderr
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stdio-is-blocking.rs
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stmt_expr_attrs_no_feature.rs
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string-box-error.rs
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struct-ctor-mangling.rs
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suggest-null-ptr.fixed
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suggest-null-ptr.rs
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super-at-top-level.rs
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super-fast-paren-parsing.rs
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super.rs
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svh-add-nothing.rs
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swap-1.rs
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swap-overlapping.rs
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switched-expectations.rs
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syntax-extension-minor.rs
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tag-type-args.rs
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tag-type-args.stderr
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tag-variant-cast-non-nullary.fixed
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tag-variant-cast-non-nullary.rs
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tag-variant-cast-non-nullary.stderr
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tail-call-arg-leak.rs
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tail-cps.rs
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tail-typeck.rs
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tail-typeck.stderr
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tool_lints_2018_preview.rs
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tool_lints-fail.rs
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tool_lints-rpass.rs
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tool_lints.rs
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trailing-comma.rs
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trait-impl-bound-suggestions.fixed
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trait-impl-bound-suggestions.rs
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trait-impl-bound-suggestions.stderr
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trait-method-number-parameters.rs
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transmute-equal-assoc-types.rs
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transmute-non-immediate-to-immediate.rs
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trivial_casts-rpass.rs
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trivial_casts-rpass.stderr
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try-from-int-error-partial-eq.rs
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try-operator-hygiene.rs
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try-operator.rs
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tydesc-name.rs
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type_length_limit.polonius.stderr
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type_length_limit.rs
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type_length_limit.stderr
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type-id-higher-rank-2.rs
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type-namespace.rs
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type-param-constraints.rs
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type-param.rs
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type-ptr.rs
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type-use-i1-versus-i8.rs
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typeid-intrinsic.rs
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typestate-multi-decl.rs
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unconstrained-none.rs
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unconstrained-ref.rs
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underscore-ident-matcher.rs
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underscore-lifetimes.rs
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underscore-method-after-integer.rs
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unevaluated_fixed_size_array_len.rs
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uninit-empty-types.rs
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unit.rs
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unknown-language-item.rs
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unknown-lint-tool-name.rs
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unknown-llvm-arg.rs
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unknown-llvm-arg.stderr
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unknown-tool-name.rs
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unknown-tool-name.stderr
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unnamed_argument_mode.rs
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unop-move-semantics.rs
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unop-neg-bool.rs
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unreachable-code-1.rs
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unreachable-code.rs
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unsigned-literal-negation.rs
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unused-move-capture.rs
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unused-move.rs
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unwind-no-uwtable.rs
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use-import-export.rs
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use-keyword-2.rs
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use-module-level-int-consts.rs
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use-nested-groups.rs
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used.rs
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used.stderr
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using-target-feature-unstable.rs
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usize-generic-argument-parent.rs
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utf8_idents.rs
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utf8-bom.rs
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wait-forked-but-failed-child.rs
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walk-struct-literal-with.rs
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walk-struct-literal-with.stderr
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weak-new-uninhabited-issue-48493.rs
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weird-exit-code.rs
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weird-exprs.rs
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windows-subsystem-invalid.rs
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windows-subsystem-invalid.stderr
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write-fmt-errors.rs
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writing-to-immutable-vec.rs
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wrong-hashset-issue-42918.rs
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README.md

UI Tests

This folder contains rustc's UI tests.

Test Directives (Headers)

Typically, a UI test will have some test directives / headers which are special comments that tell compiletest how to build and intepret a test.

As part of an on-going effort to rewrite compiletest (see https://github.com/rust-lang/compiler-team/issues/536), a major change proposal to change legacy compiletest-style headers // <directive> to ui_test-style headers //@ <directive> was accepted (see https://github.com/rust-lang/compiler-team/issues/512.

An example directive is ignore-test. In legacy compiletest style, the header would be written as

// ignore-test

but in ui_test style, the header would be written as

//@ ignore-test

compiletest is changed to accept only //@ directives for UI tests (currently), and will reject and report an error if it encounters any comments // <content> that may be parsed as an legacy compiletest-style test header. To fix this, you should migrate to the ui_test-style header //@ <content>.

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