Landing: bf37e8d84699

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Project / Subsystem

gcc / gccrs

Date

2026-09-07

Author

Philip Herron

Commit

bf37e8d84699096e9d184f14adfbf6ecf372577a

Source

github

Perf win

Breaking

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All attributes

project: gcc
subsystem: gccrs
patch_id: —
commit_hash: bf37e8d84699096e9d184f14adfbf6ecf372577a
source_type: github
headline: Stops method selection on generic params
tldr: GCC Rust's method resolution now halts when encountering generic parameters to avoid incorrect matches.
author: Philip Herron
outcome: committed
performance_win: false
breaking_change: false
series_id: —
series_parts: []
tags: • rust
• generics
• method resolution
• type-checking
discussion_id_link: —
bugzilla_pr: —
url: https://github.com/gcc-mirror/gcc/commit/bf37e8d84699096e9d184f14adfbf6ecf372577a
date: 2026-09-07T00:00:00.000Z

GCC Rust’s method selection process has been updated to stop when it encounters generic parameters. This prevents the type unification machinery from incorrectly matching types by injecting inferred variables. Instead, generics are expected to match directly via their associated type bound predicates, which are checked separately. This ensures more accurate method resolution in the presence of generics.