Stuart Cook
645aa9232b
rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names Resolves rust-lang/rust#148275 by preventing name collisions in the `#[bench]` macro. Previously, a user-defined function named "b" could not be benchmarked because the macro-generated lambda identity collided with the same name. We now generate the lambda ident as `__bench_<function_name>`, ensuring it is always distinct from the user’s function. Because the prefix is applied recursively (e.g. benchmarking `__bench_b` produces a lambda ident `__bench___bench_b`), there is no possible function name that can equal its corresponding lambda ident. This guarantees that the user can safely bench a function of any valid name without risk of identifier collision.
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