std: do not overwrite style in get_backtrace_style
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If another thread calls `set_backtrace_style` while a `get_backtrace_style` is reading the environment variables, `get_backtrace_style` will overwrite the value. Use an atomic CAS to avoid this.
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…llaumeGomez Rollup of 10 pull requests Successful merges: - rust-lang#128149 (nontemporal_store: make sure that the intrinsic is truly just a hint) - rust-lang#128394 (Unify run button display with "copy code" button and with mdbook buttons) - rust-lang#128537 (const vector passed through to codegen) - rust-lang#128632 (std: do not overwrite style in `get_backtrace_style`) - rust-lang#128878 (Slightly refactor `Flags` in bootstrap) - rust-lang#128886 (Get rid of some `#[allow(rustc::untranslatable_diagnostic)]`) - rust-lang#128929 (Fix codegen-units tests that were disabled 8 years ago) - rust-lang#128937 (Fix warnings in rmake tests on `x86_64-unknown-linux-gnu`) - rust-lang#128978 (Use `assert_matches` around the compiler more) - rust-lang#128994 (Fix bug in `Parser::look_ahead`.) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#128632 - joboet:dont_overwrite_style, r=Amanieu std: do not overwrite style in `get_backtrace_style` If another thread calls `set_backtrace_style` while a `get_backtrace_style` is reading the environment variables, `get_backtrace_style` will overwrite the value. Use an atomic CAS to avoid this.
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If another thread calls
set_backtrace_stylewhile aget_backtrace_styleis reading the environment variables,get_backtrace_stylewill overwrite the value. Use an atomic CAS to avoid this.