http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60566
--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> --- (In reply to Markus Trippelsdorf from comment #2) > --- part_good.s 2014-03-19 08:57:10.100342064 +0100 > +++ part_bad.s 2014-03-19 08:56:50.134141664 +0100 > - .quad _ZN6KParts13ReadWritePartD1Ev > - .quad _ZN6KParts13ReadWritePartD0Ev > + .quad __cxa_pure_virtual > + .quad __cxa_pure_virtual I have trouble believing this is causing the problem you are seeing; if something were actually calling through this vtable slot it would write "pure virtual method called" to stderr and then terminate.