[Bug rust/119353] [15 regression] Rust fails to build (build failure: error[E0554]: `#![feature]` may not be used on the stable release channel)

[felix-gcc at fefe dot de via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119353

--- Comment #2 from felix-gcc at fefe dot de ---
I ran rustup update stable.

$ rustc --version
rustc 1.85.0 (4d91de4e4 2025-02-17)