New constraint solver: emitWantecCts

David T says: I'm getting a panic when trying to build the listlike package with ghc HEAD on Mac OSX 10.7, using a 64bit build of ghc.

Building ListLike-3.1.2...
[1 of 8] Compiling Data.ListLike.FoldableLL ( src/Data/ListLike/FoldableLL.hs, dist/build/Data/ListLike/FoldableLL.o
)
[2 of 8] Compiling Data.ListLike.Base ( src/Data/ListLike/Base.hs, dist/build/Data/ListLike/Base.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.3.20111117 for x86_64-apple-darwin):
	emitWantecCts: can't emit non-wanted!

Trac metadata

Trac field	Value
Version	7.2.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
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