
#11224: Program doesn't preserve semantics after pattern synonym inlining. -------------------------------------+------------------------------------- Reporter: anton.dubovik | Owner: Type: bug | Status: new Priority: highest | Milestone: 8.0.1 Component: Compiler | Version: 7.10.2 Resolution: | Keywords: | PatternSynonyms Operating System: Windows | Architecture: x86_64 Type of failure: Incorrect result | (amd64) at runtime | Test Case: Blocked By: | Blocking: Related Tickets: #11225 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mpickering): I think the solution you propose is very confusing to users. I think we should be able to do better inferring whether a type variable univ/ex especially as GHC already manages to infer the correct signature. Doing so would require looking at the pattern synonym itself but I don't think this is too bad? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11224#comment:13 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler