Changes to ghc(2)

Changes to ghc:
commit 20b1a0772a6f830cbfba016baea99628a792bb7b
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Fri Jan 17 15:03:39 2014 +0000

    Add testcase for #4267

commit 19e09df47f48707718150fb9b4b9135ec742bed2
Author: Joachim Breitner <mail@joachim-breitner.de>
Date:   Fri Jan 17 14:08:30 2014 +0000

    Add a test case for #5949