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Mazdak Farrokhzad
a558668cf2
Avoid ICE when referencing desugared local binding in borrow error To avoid leaking the names of local bindings from expressions like for loops, #60984 explicitly ignored them, but an assertion that `LocalKind::Var` *must* have a name would trigger an ICE. Before this change, the binding generated by desugaring the for loop would leak into the diagnostic (#63027): ``` error[E0515]: cannot return value referencing local variable `__next` --> return-local-binding-from-desugaring.rs:LL:CC | LL | for ref x in xs { | ----- `__next` is borrowed here ... LL | result | ^^^^^^ returns a value referencing data owned by the current function ``` Ideally `LocalKind` would carry more information to more accurately explain the problem, but for now, in order to avoid the ICE (fix #63026), we accept `LocalKind::Var` without a name and produce the following output: ``` error[E0515]: cannot return value referencing local binding --> $DIR/return-local-binding-from-desugaring.rs:30:5 | LL | for ref x in xs { | -- local binding introduced here ... LL | result | ^^^^^^ returns a value referencing data owned by the current function ```
This directory contains the source code of the rust project, including:
rustcand its testslibstd- Various submodules for tools, like rustdoc, rls, etc.
For more information on how various parts of the compiler work, see the rustc guide.
There is also useful content in the following READMEs, which are gradually being moved over to the guide:
- https://github.com/rust-lang/rust/tree/master/src/librustc/ty/query
- https://github.com/rust-lang/rust/tree/master/src/librustc/dep_graph
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/higher_ranked
- https://github.com/rust-lang/rust/tree/master/src/librustc/infer/lexical_region_resolve