std: Fail more gracefully on thread spawn errors #13606
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On windows, correctly check for errors when spawning threads, and on both windows and unix handle the error more gracefully rather than printing an opaque assertion failure. Closes rust-lang#13589
bors
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On windows, correctly check for errors when spawning threads, and on both windows and unix handle the error more gracefully rather than printing an opaque assertion failure. Closes #13589
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fix: Add trait alias grammar to rust.ungram We already parse them, but the grammar was never updated to reflect that
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On windows, correctly check for errors when spawning threads, and on both
windows and unix handle the error more gracefully rather than printing an opaque
assertion failure.
Closes #13589