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Richard Eisenberg authored
In particular, this allows correct tracking of specified/invisible for variables in Haskell98 data constructors and in pattern synonyms. GADT-syntax constructors are harder, and are left until #11721. This was all inspired by Simon's comments to my fix for #11512, which this subsumes. Test case: ghci/scripts/TypeAppData [skip ci] (The test case fails because of an unrelated problem fixed in the next commit.)
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