Using a (meaningless) generic currency sign (¤) instead of $ causes panicing

The following two lines of HS produces the reported error. It was actually a mistype and probably not that serious, but I was told to report it.

The issue is combining the "generic currency" symbol ¤ with the Integral constraint (using e.g. Integer instead as the constraint does not produce the same error).

Prelude> let ones x = snd $ divMod x 10
Prelude> ones ¤ (5 :: Integral)
ghc: panic! (the 'impossible' happened)
  (GHC version 8.0.2 for x86_64-unknown-linux):
	initTc: unsolved constraints
  WC {wc_insol =
        [W] ¤_a2l9 :: t_a2l8[tau:1] (CHoleCan: ¤)
        [W] ¤_a2lJ :: t_a2lI[tau:1] (CHoleCan: ¤)}

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Trac metadata

Trac field	Value
Version	8.0.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	GHCi
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture