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Extend rustc_on_unimplemented to query for closures #48534

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Extend rustc_on_unimplemented to query for closures#48534
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A-closuresArea: Closures (`|…| { … }`)A-diagnosticsArea: Messages for errors, warnings, and lintsC-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
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@estebank
estebank
opened on Feb 25, 2018

Add a filter to rustc_on_unimplemented to allow the querying for the existence of a closure in the requirement chain. This should allow handling #24909 and #33307 by providing a specific message recommending marking the closure as move.

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    A-closuresArea: Closures (`|…| { … }`)A-diagnosticsArea: Messages for errors, warnings, and lintsC-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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