Fix a leak in `DiagnosticBuilder::into_diagnostic`.#69628

Merged

bors merged 1 commit intorust-lang:masterfrom nnethercote:fix-DiagnosticBuilder-into_diagnostic-leak

Mar 3, 2020

+5-6

Commits on Mar 2, 2020

Fix a leak in DiagnosticBuilder::into_diagnostic.
nnethercote
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