:browse GHC.TypeLits causes panic

Upon :browse GHC.TypeLits I get:

ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 7.9.20140606 for x86_64-unknown-linux):
	toIfaceDecl: BuiltInFamTyCon *

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

Trac metadata

Trac field	Value
Version	7.8.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture