http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46749
--- Comment #9 from Iain Sandoe <iains at gcc dot gnu.org> 2010-12-01 20:46:11 UTC --- my (quick) reading of this is that -- the bugfix made by 167292 has caused the source file to be recognized -- causing dsymutil to fire up -- and revealing a pre-existing, probably unrelated problem.