id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
2719	urk! lookup local fingerprint with -O and TemplateHaskell	ganesh		"An interesting feature of this bug is that it goes away when TemplateHaskell is removed (it's cut down from a much larger test case which actually used that)

-O is also necessary.

ghc -c -O Foo.hs

ghc: panic! (the 'impossible' happened)
  (GHC version 6.10.0.20081007 for i386-unknown-mingw32):
        urk! lookup local fingerprint main:Foo.:CoActionT{tc rj4}"	bug	closed	normal		Compiler	6.10.1	duplicate		ganesh.sittampalam@…	Windows	x86		Unknown