Std/thread: deny unsafe op in unsafe fn Partial fix of #73904. This encloses `unsafe` operations in `unsafe fn` in `libstd/thread`. `@rustbot` modify labels: F-unsafe-block-in-unsafe-fn
Std/thread: deny unsafe op in unsafe fn Partial fix of #73904. This encloses `unsafe` operations in `unsafe fn` in `libstd/thread`. `@rustbot` modify labels: F-unsafe-block-in-unsafe-fn