Duplicate record field

This compiles.

data D = D1 { f1 :: Int }
       | D2 { f1, f1 :: Int } -- Oops, duplicate

Probably harmless, but still.

Trac metadata

Trac field	Value
Version	7.8.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	Compiler
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