Improve Debug implementations of Mutex and RwLock. #83561
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They now show the poison flag and use debug_non_exhaustive.
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Rollup of 10 pull requests Successful merges: - rust-lang#79399 (Use detailed and shorter fs error explaination) - rust-lang#83348 (format macro argument parsing fix) - rust-lang#83462 (ExitStatus: print "exit status: {}" rather than "exit code: {}" on unix) - rust-lang#83526 (lazily calls some fns) - rust-lang#83558 (Use DebugStruct::finish_non_exhaustive() in std.) - rust-lang#83559 (Fix Debug implementation for RwLock{Read,Write}Guard.) - rust-lang#83560 (Derive Debug for io::Chain instead of manually implementing it.) - rust-lang#83561 (Improve Debug implementations of Mutex and RwLock.) - rust-lang#83567 (Update rustup cross-compilation docs link) - rust-lang#83569 (Add regression tests for rust-lang#56445) Failed merges: r? `@ghost` `@rustbot` modify labels: rollup
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This improves the Debug implementations of Mutex and RwLock.
They now show the poison flag and use debug_non_exhaustive. (See #67364.)