rust/tests/ui/sync/mutexguard-sync.rs, branch try-perf

rust/tests/ui/sync/mutexguard-sync.rs, branch try-perf https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=try-perf 2023-01-19T20:09:25+00:00 Add `rustc_on_unimplemented` on `Sync` for cell types 2023-01-19T20:09:25+00:00 Nilstrieb 48135649+Nilstrieb@users.noreply.github.com 2023-01-16T17:51:31+00:00 urn:sha1:6d0c91fda35f7a78ff688ea623d1d2ee9b16cad7 Suggest using a lock instead.