Fix spurious 'value moved here in previous iteration of loop' messages#73600
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bors merged 1 commit intorust-lang:masterfrom Jun 23, 2020
Merged
Fix spurious 'value moved here in previous iteration of loop' messages#73600bors merged 1 commit intorust-lang:masterfrom
bors merged 1 commit intorust-lang:masterfrom
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Fixes rust-lang#46099 Previously, we would check the 'move' and 'use' spans to see if we should emit this message. However, this can give false positives when macros are involved, since two distinct expressions may end up with the same span. Instead, we check the actual MIR `Location`, which eliminates false positives.
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| LL | test!({b}); | ||
| | ^ | ||
| | | | ||
| | value moved here | ||
| | value used here after move |
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Is there a reason this is not formatted as
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| LL | test!({b}); | |
| | ^ | |
| | | | |
| | value moved here | |
| | value used here after move | |
| LL | test!({b}); | |
| | ^ value moved here | |
| | | value used here after move |
It's outside the scope of this PR, just wondering.
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I'm not sure - I think that might just be how the diagnostic framework formats messages.
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Nice. @bors r+ |
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📌 Commit 953104e has been approved by |
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@bors rollup |
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Rollup of 7 pull requests Successful merges: - rust-lang#71756 (add Windows system error codes that should map to io::ErrorKind::TimedOut) - rust-lang#73495 (Converted all platform-specific stdin/stdout/stderr implementations to use io:: traits) - rust-lang#73575 (Fix typo in error_codes doc) - rust-lang#73578 (Make is_freeze and is_copy_modulo_regions take TyCtxtAt) - rust-lang#73586 (switch_ty is redundant) - rust-lang#73600 (Fix spurious 'value moved here in previous iteration of loop' messages) - rust-lang#73610 (Clean up E0699 explanation) Failed merges: r? @ghost
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Fixes #46099
Previously, we would check the 'move' and 'use' spans to see if we
should emit this message. However, this can give false positives when
macros are involved, since two distinct expressions may end up with the
same span.
Instead, we check the actual MIR
Location, which eliminates falsepositives.