[5.1][Diagnostics] Don't crash trying to diagnose missing opaque result type #26904
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@swift-ci please test |
AnnaZaks
approved these changes
Aug 28, 2019
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Avoid a crash when type associated with opaque result
hasn't been explicitly specified and couldn't be inferred by type checker.
Issue: rdar://problem/52774804
Scope: Constraint solver in diagnostic mode.
Risk: Very Low.
Testing: Added compiler regression tests.
Reviewed by: @xedin
Resolves: rdar://problem/52774804