[Bug other/56881] Miscompilation (optimisation failure?) causing NULL dereference and segfault at runtime

[devspam at moreofthesa dot me.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56881

--- Comment #5 from devspam at moreofthesa dot me.uk 2013-04-10 15:02:54 UTC ---
The tarball which I've attached also provides its own test case – compile it
then pass it one of its own source files. It'll either segfault or not
depending on compile-time optimisation settings.