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1.36 changes the UnwindSafe impl precondition for HashMap #62301

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#62304
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1.36 changes the UnwindSafe impl precondition for HashMap#62301
#62304
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A-collectionsArea: `std::collections`C-bugCategory: This is a bug.T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.regression-from-stable-to-betaPerformance or correctness regression from stable to beta.
@CAD97

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@CAD97
CAD97
opened on Jul 2, 2019

https://play.rust-lang.org/?version=stable&mode=debug&edition=2018&gist=0e5a528fc978a90aa15bbf01f68dd1bf

assert_unwind_safe::<HashMap<(), UnsafeCell<()>>>();

Successfully compiles on stable 1.35, fails on beta/pre 1.36.

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    A-collectionsArea: `std::collections`C-bugCategory: This is a bug.T-libs-apiRelevant to the library API team, which will review and decide on the PR/issue.regression-from-stable-to-betaPerformance or correctness regression from stable to beta.

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