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[nll] better error message when returning refs to upvars #54802

Merged
merged 2 commits into from
Oct 10, 2018
Merged

[nll] better error message when returning refs to upvars #54802

merged 2 commits into from
Oct 10, 2018

Commits on Oct 9, 2018

  1. Improve errors for FnMut closures. 

    This commit improves the errors for `FnMut` closures where a reference
to a captured variable is escaping.
    @davidtwco
    davidtwco committed Oct 9, 2018
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  2. Improve message for closure returning a closure. 

    Now when a `FnMut` closure is returning a closure that contains a
reference to a captured variable, we provide an error that makes it more
clear what is happening.
    @davidtwco
    davidtwco committed Oct 9, 2018
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    98633b4 View commit details
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