http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47640
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> 2011-02-08 14:37:27 UTC --- tree-ssa-forwprop is either not doing the right thing WRT EH edges when it removes statements which potentially throw or shouldn't be removing the potentially throwing statements. There's no doubt in my mind there's a myriad of these kinds of problems throughout the compiler.
