id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
5485	Build failure on powerpc-linux at compiler/stgSyn/CoreToStg.lhs line 188	erikd		"Current GHC head fails to build on powerpc-linux:

{{{
WARNING: file compiler/stgSyn/CoreToStg.lhs line 222
GHC.Num.$dmnegate False True
ghc-stage1: panic! (the 'impossible' happened)
  (GHC version 7.3.20110913 for powerpc-unknown-linux):
        ASSERT failed! file compiler/stgSyn/CoreToStg.lhs line 188
base:GHC.Num.$dmnegate{v r7H} [gid]

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

}}}

Resetting to the  version before this one:

{{{
commit fdac48f3a955997f5f9caddf5e38105cd636a010
Author: Ian Lynagh <igloo@earth.li>
Date:   Mon Sep 12 23:24:53 2011 +0100
}}}

and it builds.
"	bug	closed	normal		Compiler	7.3	fixed			Linux	powerpc	Building GHC failed