Swift 5.5 was generating two things in the .swiftinterface that were new to us:
arguments in closure parameter types
Swift.Void as a type
The first thing exposed a bug where we promoted the type label from a singleton tuple to the enclosing type but didn't clear the one in the contained type. This would generate two type labels instead of one.
The second thing we didn't know how to handle Swift.Void so I special cased the parser such that if it gets Swift.Void it turns it into () which we already know how to handle.
Added a test for the double type label and unignored the test that was failing in Swift 5.5
This fixed issue 737.
Swift 5.5 was generating two things in the
.swiftinterfacethat were new to us:Swift.Voidas a typeThe first thing exposed a bug where we promoted the type label from a singleton tuple to the enclosing type but didn't clear the one in the contained type. This would generate two type labels instead of one.
The second thing we didn't know how to handle
Swift.Voidso I special cased the parser such that if it getsSwift.Voidit turns it into()which we already know how to handle.Added a test for the double type label and unignored the test that was failing in Swift 5.5