[MiscDiagnostics] Fix a crash in OpaqueUnderlyingTypeChecker
#42039
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xedin
changed the title
OpaqueUnderlyingTypeCheckerOpaqueUnderlyingTypeChecker
Since opaque result type can reference generic parameters of context, it cannot reply purely on "index" of the opaque generic parameter while diagnosing a problem, it needs to perform a type substitution using a substitution map of a particular candidate to determine the underlying type. Resolves: rdar://90456579
hborla
approved these changes
Mar 25, 2022
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@swift-ci please test |
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Since opaque result type can reference generic parameters of context,
it cannot reply purely on "index" of the opaque generic parameter
while diagnosing a problem, it needs to perform a type substitution
using a substitution map of a particular candidate to determine the
underlying type.
Resolves: rdar://90456579