External Core is broken

$ ghc -fext-core Main.hs
$ ghc -fglasgow-exts Main.hcr
ghc-6.5: panic! (the `impossible' happened, GHC version 6.5):
	tcIfaceGlobal (local): not found:
    Main.main{v rrl}
    []

Please report it as a compiler bug to glasgow-haskell-bugs@haskell.org,
or http://sourceforge.net/projects/ghc/.

Main.hs consists of: main = putStr "Hello world!"

I'll fix this myself if I still have commit access; I just want to have a record of it.

Trac metadata

Trac field	Value
Version	6.4.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	Compiler (Parser)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Multiple
Architecture	Multiple