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Rollup merge of #144226 - cjgillot:known-panics-panics, r=oli-obk

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Do not assert layout in KnownPanicsLint.

Fixes rust-lang/rust#121176
Fixes rust-lang/rust#129109
Fixes rust-lang/rust#130970
Fixes rust-lang/rust#131347
Fixes rust-lang/rust#139872
Fixes rust-lang/rust#140332
This commit is contained in:
Matthias Krüger
2025-07-27 10:19:00 +02:00
committed by GitHub
parent 052114f0c5 8817572b45
commit 58f10376f4
31 changed files with 159 additions and 229 deletions
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compiler/rustc_hir_analysis/src/check/check.rs
+2 -1
View File
@@ -767,7 +767,8 @@ pub(crate) fn check_item_type(tcx: TyCtxt<'_>, def_id: LocalDefId) -> Result<(),
DefKind::Static { .. } => {
check_static_inhabited(tcx, def_id);
check_static_linkage(tcx, def_id);
res = res.and(wfcheck::check_static_item(tcx, def_id));
let ty = tcx.type_of(def_id).instantiate_identity();
res = res.and(wfcheck::check_static_item(tcx, def_id, ty, true));
}
DefKind::Const => res = res.and(wfcheck::check_const_item(tcx, def_id)),
_ => unreachable!(),
compiler/rustc_hir_analysis/src/check/wfcheck.rs
+6 -5
View File
@@ -1180,12 +1180,13 @@ fn check_item_fn(
}
#[instrument(level = "debug", skip(tcx))]
pub(super) fn check_static_item(
tcx: TyCtxt<'_>,
pub(crate) fn check_static_item<'tcx>(
tcx: TyCtxt<'tcx>,
item_id: LocalDefId,
ty: Ty<'tcx>,
should_check_for_sync: bool,
) -> Result<(), ErrorGuaranteed> {
enter_wf_checking_ctxt(tcx, item_id, |wfcx| {
let ty = tcx.type_of(item_id).instantiate_identity();
let span = tcx.ty_span(item_id);
let item_ty = wfcx.deeply_normalize(span, Some(WellFormedLoc::Ty(item_id)), ty);
@@ -1212,9 +1213,9 @@ pub(super) fn check_static_item(
}
// Ensure that the end result is `Sync` in a non-thread local `static`.
let should_check_for_sync = tcx.static_mutability(item_id.to_def_id())
== Some(hir::Mutability::Not)
let should_check_for_sync = should_check_for_sync
&& !is_foreign_item
&& tcx.static_mutability(item_id.to_def_id()) == Some(hir::Mutability::Not)
&& !tcx.is_thread_local_static(item_id.to_def_id());
if should_check_for_sync {
compiler/rustc_hir_analysis/src/collect/type_of.rs
+17 -2
View File
@@ -14,6 +14,7 @@
use rustc_span::{DUMMY_SP, Ident, Span};
use super::{HirPlaceholderCollector, ItemCtxt, bad_placeholder};
use crate::check::wfcheck::check_static_item;
use crate::errors::TypeofReservedKeywordUsed;
use crate::hir_ty_lowering::HirTyLowerer;
@@ -217,7 +218,13 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<'_
"static variable",
)
} else {
icx.lower_ty(ty)
let ty = icx.lower_ty(ty);
// MIR relies on references to statics being scalars.
// Verify that here to avoid ill-formed MIR.
match check_static_item(tcx, def_id, ty, false) {
Ok(()) => ty,
Err(guar) => Ty::new_error(tcx, guar),
}
}
}
ItemKind::Const(ident, _, ty, body_id) => {
@@ -275,7 +282,15 @@ pub(super) fn type_of(tcx: TyCtxt<'_>, def_id: LocalDefId) -> ty::EarlyBinder<'_
let args = ty::GenericArgs::identity_for_item(tcx, def_id);
Ty::new_fn_def(tcx, def_id.to_def_id(), args)
}
ForeignItemKind::Static(t, _, _) => icx.lower_ty(t),
ForeignItemKind::Static(ty, _, _) => {
let ty = icx.lower_ty(ty);
// MIR relies on references to statics being scalars.
// Verify that here to avoid ill-formed MIR.
match check_static_item(tcx, def_id, ty, false) {
Ok(()) => ty,
Err(guar) => Ty::new_error(tcx, guar),
}
}
ForeignItemKind::Type => Ty::new_foreign(tcx, def_id.to_def_id()),
},
tests/crashes/121176.rs
-9
View File
@@ -1,9 +0,0 @@
//@ known-bug: #121176
//@ needs-rustc-debug-assertions
use std::fmt::Debug;
static STATIC_1: dyn Debug + Sync = *();
fn main() {
println!("{:?}", &STATIC_1);
}
tests/crashes/129109.rs
-10
View File
@@ -1,10 +0,0 @@
//@ known-bug: rust-lang/rust#129109
//@ compile-flags: -Zmir-enable-passes=+GVN -Zvalidate-mir
extern "C" {
pub static mut symbol: [i8];
}
fn main() {
println!("C", unsafe { &symbol });
}
tests/crashes/130970.rs
-9
View File
@@ -1,9 +0,0 @@
//@ known-bug: #130970
//@ compile-flags: -Zmir-enable-passes=+GVN -Zvalidate-mir
fn main() {
extern "C" {
static symbol: [usize];
}
println!("{}", symbol[0]);
}
tests/crashes/131347.rs
-9
View File
@@ -1,9 +0,0 @@
//@ known-bug: #131347
//@ compile-flags: -Zmir-enable-passes=+GVN -Zmir-enable-passes=+Inline -Zvalidate-mir
struct S;
static STUFF: [i8] = [0; S::N];
fn main() {
assert_eq!(STUFF, [0; 63]);
}
tests/ui/consts/const-unsized.rs
-4
View File
@@ -10,14 +10,10 @@
static STATIC_1: dyn Debug + Sync = *(&1 as &(dyn Debug + Sync));
//~^ ERROR the size for values of type
//~| ERROR cannot move out of a shared reference
static STATIC_BAR: str = *"bar";
//~^ ERROR the size for values of type
//~| ERROR cannot move out of a shared reference
fn main() {
println!("{:?} {:?} {:?} {:?}", &CONST_0, &CONST_FOO, &STATIC_1, &STATIC_BAR);
//~^ ERROR: cannot move a value of type `str`
//~| ERROR: cannot move a value of type `dyn Debug + Sync`
}
tests/ui/consts/const-unsized.stderr
+4 -28
View File
@@ -26,7 +26,7 @@ LL | static STATIC_1: dyn Debug + Sync = *(&1 as &(dyn Debug + Sync));
= note: statics and constants must have a statically known size
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/const-unsized.rs:15:1
--> $DIR/const-unsized.rs:14:1
|
LL | static STATIC_BAR: str = *"bar";
| ^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
@@ -46,31 +46,7 @@ error[E0507]: cannot move out of a shared reference
LL | const CONST_FOO: str = *"foo";
| ^^^^^^ move occurs because value has type `str`, which does not implement the `Copy` trait
error[E0507]: cannot move out of a shared reference
--> $DIR/const-unsized.rs:11:37
|
LL | static STATIC_1: dyn Debug + Sync = *(&1 as &(dyn Debug + Sync));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ move occurs because value has type `dyn Debug + Sync`, which does not implement the `Copy` trait
error: aborting due to 6 previous errors
error[E0507]: cannot move out of a shared reference
--> $DIR/const-unsized.rs:15:26
|
LL | static STATIC_BAR: str = *"bar";
| ^^^^^^ move occurs because value has type `str`, which does not implement the `Copy` trait
error[E0161]: cannot move a value of type `dyn Debug + Sync`
--> $DIR/const-unsized.rs:20:38
|
LL | println!("{:?} {:?} {:?} {:?}", &CONST_0, &CONST_FOO, &STATIC_1, &STATIC_BAR);
| ^^^^^^^ the size of `dyn Debug + Sync` cannot be statically determined
error[E0161]: cannot move a value of type `str`
--> $DIR/const-unsized.rs:20:48
|
LL | println!("{:?} {:?} {:?} {:?}", &CONST_0, &CONST_FOO, &STATIC_1, &STATIC_BAR);
| ^^^^^^^^^ the size of `str` cannot be statically determined
error: aborting due to 10 previous errors
Some errors have detailed explanations: E0161, E0277, E0507.
For more information about an error, try `rustc --explain E0161`.
Some errors have detailed explanations: E0277, E0507.
For more information about an error, try `rustc --explain E0277`.
tests/ui/coroutine/layout-error.rs
+1
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@@ -17,6 +17,7 @@ fn spawn(&self, _: impl FnOnce() -> F) {
}
pub type F = impl Future;
#[define_opaque(F)]
fn foo()
where
tests/ui/coroutine/layout-error.stderr
+1 -1
View File
@@ -1,5 +1,5 @@
error[E0425]: cannot find value `Foo` in this scope
--> $DIR/layout-error.rs:26:17
--> $DIR/layout-error.rs:27:17
|
LL | let a = Foo;
| ^^^ not found in this scope
tests/ui/dyn-compatibility/taint-const-eval.rs
-1
View File
@@ -6,6 +6,5 @@ trait Qux {
static FOO: &(dyn Qux + Sync) = "desc";
//~^ ERROR the trait `Qux` is not dyn compatible
//~| ERROR the trait `Qux` is not dyn compatible
fn main() {}
tests/ui/dyn-compatibility/taint-const-eval.stderr
+1 -25
View File
@@ -21,30 +21,6 @@ help: alternatively, consider constraining `bar` so it does not apply to trait o
LL | fn bar() where Self: Sized;
| +++++++++++++++++
error[E0038]: the trait `Qux` is not dyn compatible
--> $DIR/taint-const-eval.rs:7:15
|
LL | static FOO: &(dyn Qux + Sync) = "desc";
| ^^^^^^^^^^^^^^ `Qux` is not dyn compatible
|
note: for a trait to be dyn compatible it needs to allow building a vtable
for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
--> $DIR/taint-const-eval.rs:4:8
|
LL | trait Qux {
| --- this trait is not dyn compatible...
LL | fn bar();
| ^^^ ...because associated function `bar` has no `self` parameter
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider turning `bar` into a method by giving it a `&self` argument
|
LL | fn bar(&self);
| +++++
help: alternatively, consider constraining `bar` so it does not apply to trait objects
|
LL | fn bar() where Self: Sized;
| +++++++++++++++++
error: aborting due to 2 previous errors
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0038`.
tests/ui/extern/issue-36122-accessing-externed-dst.rs
Vendored
-1
View File
@@ -3,5 +3,4 @@ fn main() {
static symbol: [usize]; //~ ERROR: the size for values of type
}
println!("{}", symbol[0]);
//~^ ERROR: extern static is unsafe
}
tests/ui/extern/issue-36122-accessing-externed-dst.stderr
Vendored
+2 -11
View File
@@ -7,15 +7,6 @@ LL | static symbol: [usize];
= help: the trait `Sized` is not implemented for `[usize]`
= note: statics and constants must have a statically known size
error[E0133]: use of extern static is unsafe and requires unsafe function or block
--> $DIR/issue-36122-accessing-externed-dst.rs:5:20
|
LL | println!("{}", symbol[0]);
| ^^^^^^ use of extern static
|
= note: extern statics are not controlled by the Rust type system: invalid data, aliasing violations or data races will cause undefined behavior
error: aborting due to 1 previous error
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0133, E0277.
For more information about an error, try `rustc --explain E0133`.
For more information about this error, try `rustc --explain E0277`.
tests/ui/layout/issue-84108.rs
-2
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@@ -14,5 +14,3 @@
static BAZ: ([u8], usize) = ([], 0);
//~^ ERROR the size for values of type `[u8]` cannot be known at compilation time
//~| ERROR the size for values of type `[u8]` cannot be known at compilation time
//~| ERROR mismatched types
tests/ui/layout/issue-84108.stderr
+1 -20
View File
@@ -57,26 +57,7 @@ LL | const BAR: (&Path, [u8], usize) = ("hello", [], 42);
= note: expected slice `[u8]`
found array `[_; 0]`
error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
--> $DIR/issue-84108.rs:15:13
|
LL | static BAZ: ([u8], usize) = ([], 0);
| ^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `[u8]`
= note: only the last element of a tuple may have a dynamically sized type
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0308]: mismatched types
--> $DIR/issue-84108.rs:15:30
|
LL | static BAZ: ([u8], usize) = ([], 0);
| ^^ expected `[u8]`, found `[_; 0]`
|
= note: expected slice `[u8]`
found array `[_; 0]`
error: aborting due to 8 previous errors
error: aborting due to 6 previous errors
Some errors have detailed explanations: E0277, E0308, E0412.
For more information about an error, try `rustc --explain E0277`.
tests/ui/mir/static-by-value-dyn.rs
+14
View File
@@ -0,0 +1,14 @@
//! Regression test for #121176
//! KnownPanicsLint used to assert ABI compatibility in the interpreter,
//! which ICEs with unsized statics.
//@ needs-rustc-debug-assertions
use std::fmt::Debug;
static STATIC_1: dyn Debug + Sync = *();
//~^ ERROR the size for values of type `(dyn Debug + Sync + 'static)` cannot be known
//~| ERROR type `()` cannot be dereferenced
fn main() {
println!("{:?}", &STATIC_1);
}
tests/ui/mir/static-by-value-dyn.stderr
+19
View File
@@ -0,0 +1,19 @@
error[E0277]: the size for values of type `(dyn Debug + Sync + 'static)` cannot be known at compilation time
--> $DIR/static-by-value-dyn.rs:8:1
|
LL | static STATIC_1: dyn Debug + Sync = *();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `(dyn Debug + Sync + 'static)`
= note: statics and constants must have a statically known size
error[E0614]: type `()` cannot be dereferenced
--> $DIR/static-by-value-dyn.rs:8:37
|
LL | static STATIC_1: dyn Debug + Sync = *();
| ^^^ can't be dereferenced
error: aborting due to 2 previous errors
Some errors have detailed explanations: E0277, E0614.
For more information about an error, try `rustc --explain E0277`.
tests/ui/mir/static-by-value-slice.rs
+10
View File
@@ -0,0 +1,10 @@
//! Regression test for #140332
//! KnownPanicsLint used to assert ABI compatibility in the interpreter,
//! which ICEs with unsized statics.
static mut S: [i8] = ["Some thing"; 1];
//~^ ERROR the size for values of type `[i8]` cannot be known
fn main() {
assert_eq!(S, [0; 1]);
}
tests/ui/mir/static-by-value-slice.stderr
+12
View File
@@ -0,0 +1,12 @@
error[E0277]: the size for values of type `[i8]` cannot be known at compilation time
--> $DIR/static-by-value-slice.rs:5:1
|
LL | static mut S: [i8] = ["Some thing"; 1];
| ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `[i8]`
= note: statics and constants must have a statically known size
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
tests/ui/mir/static-by-value-str.rs
+15
View File
@@ -0,0 +1,15 @@
//! Regression test for #139872
//! KnownPanicsLint used to assert ABI compatibility in the interpreter,
//! which ICEs with unsized statics.
enum E {
V16(u16),
V32(u32),
}
static C: (E, u16, str) = (E::V16(0xDEAD), 0x600D, 0xBAD);
//~^ ERROR the size for values of type `str` cannot be known
pub fn main() {
let (_, n, _) = C;
}
tests/ui/mir/static-by-value-str.stderr
+13
View File
@@ -0,0 +1,13 @@
error[E0277]: the size for values of type `str` cannot be known at compilation time
--> $DIR/static-by-value-str.rs:10:1
|
LL | static C: (E, u16, str) = (E::V16(0xDEAD), 0x600D, 0xBAD);
| ^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: within `(E, u16, str)`, the trait `Sized` is not implemented for `str`
= note: required because it appears within the type `(E, u16, str)`
= note: statics and constants must have a statically known size
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
tests/ui/mir/unsized-extern-static.rs
+13
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@@ -0,0 +1,13 @@
//! Regression test for #129109
//! MIR building used to produce erroneous constants when referring to statics of unsized type.
//@ compile-flags: -Zmir-enable-passes=+GVN -Zvalidate-mir
extern "C" {
pub static mut symbol: [i8];
//~^ ERROR the size for values of type `[i8]`
}
fn main() {
println!("C", unsafe { &symbol });
//~^ ERROR argument never used
}
tests/ui/mir/unsized-extern-static.stderr
+20
View File
@@ -0,0 +1,20 @@
error: argument never used
--> $DIR/unsized-extern-static.rs:11:19
|
LL | println!("C", unsafe { &symbol });
| --- ^^^^^^^^^^^^^^^^^^ argument never used
| |
| formatting specifier missing
error[E0277]: the size for values of type `[i8]` cannot be known at compilation time
--> $DIR/unsized-extern-static.rs:6:5
|
LL | pub static mut symbol: [i8];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
|
= help: the trait `Sized` is not implemented for `[i8]`
= note: statics and constants must have a statically known size
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
tests/ui/static/issue-24446.rs
-2
View File
@@ -1,8 +1,6 @@
fn main() {
static foo: dyn Fn() -> u32 = || -> u32 {
//~^ ERROR the size for values of type
//~| ERROR cannot be shared between threads safely
//~| ERROR mismatched types
0
};
}
tests/ui/static/issue-24446.stderr
+2 -24
View File
@@ -1,12 +1,3 @@
error[E0277]: `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
--> $DIR/issue-24446.rs:2:17
|
LL | static foo: dyn Fn() -> u32 = || -> u32 {
| ^^^^^^^^^^^^^^^ `(dyn Fn() -> u32 + 'static)` cannot be shared between threads safely
|
= help: the trait `Sync` is not implemented for `(dyn Fn() -> u32 + 'static)`
= note: shared static variables must have a type that implements `Sync`
error[E0277]: the size for values of type `(dyn Fn() -> u32 + 'static)` cannot be known at compilation time
--> $DIR/issue-24446.rs:2:5
|
@@ -16,19 +7,6 @@ LL | static foo: dyn Fn() -> u32 = || -> u32 {
= help: the trait `Sized` is not implemented for `(dyn Fn() -> u32 + 'static)`
= note: statics and constants must have a statically known size
error[E0308]: mismatched types
--> $DIR/issue-24446.rs:2:35
|
LL | static foo: dyn Fn() -> u32 = || -> u32 {
| ___________________________________^
... |
LL | | };
| |_____^ expected `dyn Fn`, found closure
|
= note: expected trait object `(dyn Fn() -> u32 + 'static)`
found closure `{closure@$DIR/issue-24446.rs:2:35: 2:44}`
error: aborting due to 1 previous error
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0277, E0308.
For more information about an error, try `rustc --explain E0277`.
For more information about this error, try `rustc --explain E0277`.
tests/ui/traits/bound/on-structs-and-enums-static.rs
+1 -3
View File
@@ -6,9 +6,7 @@ struct Foo<T:Trait> {
x: T,
}
static X: Foo<usize> = Foo {
//~^ ERROR E0277
//~| ERROR E0277
static X: Foo<usize> = Foo { //~ ERROR E0277
x: 1, //~ ERROR: E0277
};
tests/ui/traits/bound/on-structs-and-enums-static.stderr
+4 -22
View File
@@ -15,29 +15,11 @@ note: required by a bound in `Foo`
LL | struct Foo<T:Trait> {
| ^^^^^ required by this bound in `Foo`
error[E0277]: the trait bound `usize: Trait` is not satisfied
--> $DIR/on-structs-and-enums-static.rs:9:11
|
LL | static X: Foo<usize> = Foo {
| ^^^^^^^^^^ the trait `Trait` is not implemented for `usize`
|
help: this trait has no implementations, consider adding one
--> $DIR/on-structs-and-enums-static.rs:1:1
|
LL | trait Trait {
| ^^^^^^^^^^^
note: required by a bound in `Foo`
--> $DIR/on-structs-and-enums-static.rs:5:14
|
LL | struct Foo<T:Trait> {
| ^^^^^ required by this bound in `Foo`
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error[E0277]: the trait bound `usize: Trait` is not satisfied
--> $DIR/on-structs-and-enums-static.rs:12:8
error[E0277]: the trait bound `{integer}: Trait` is not satisfied
--> $DIR/on-structs-and-enums-static.rs:10:8
|
LL | x: 1,
| ^ the trait `Trait` is not implemented for `usize`
| ^ the trait `Trait` is not implemented for `{integer}`
|
help: this trait has no implementations, consider adding one
--> $DIR/on-structs-and-enums-static.rs:1:1
@@ -50,6 +32,6 @@ note: required by a bound in `Foo`
LL | struct Foo<T:Trait> {
| ^^^^^ required by this bound in `Foo`
error: aborting due to 3 previous errors
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0277`.
tests/ui/wf/wf-static-type.rs
-2
View File
@@ -9,8 +9,6 @@ struct IsCopy<T:Copy> { t: T }
static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
//~^ ERROR E0277
//~| ERROR E0277
//~| ERROR E0277
fn main() { }
tests/ui/wf/wf-static-type.stderr
+1 -38
View File
@@ -16,43 +16,6 @@ LL + #[derive(Copy)]
LL | struct NotCopy;
|
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:13
|
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `NotCopy`
|
= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
|
LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: consider annotating `NotCopy` with `#[derive(Copy)]`
|
LL + #[derive(Copy)]
LL | struct NotCopy;
|
error[E0277]: the trait bound `NotCopy: Copy` is not satisfied
--> $DIR/wf-static-type.rs:10:51
|
LL | static FOO: IsCopy<Option<NotCopy>> = IsCopy { t: None };
| ^^^^ the trait `Copy` is not implemented for `NotCopy`
|
= note: required for `Option<NotCopy>` to implement `Copy`
note: required by a bound in `IsCopy`
--> $DIR/wf-static-type.rs:7:17
|
LL | struct IsCopy<T:Copy> { t: T }
| ^^^^ required by this bound in `IsCopy`
help: consider annotating `NotCopy` with `#[derive(Copy)]`
|
LL + #[derive(Copy)]
LL | struct NotCopy;
|
error: aborting due to 3 previous errors
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.