id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
1068	Trunk broken on deriving Typeable	audreyt@…		"As of 2006-12-25:

  import Data.Typeable
  data D a = C a deriving (Typeable)

yields:

  ghc-6.7: panic! (the 'impossible' happened)
  (GHC version 6.7 for i386-apple-darwin):
        funResultTy base:GHC.Prim.*{(w) tc 34d}"	bug	closed	normal		Compiler	6.7	fixed			Unknown/Multiple	Unknown/Multiple		Unknown	drv013