[Bug bootstrap/58340] [4.9 regression] gcc/cp/pt.c:7064:1: internal compiler error: in propagate_threaded_block_debug_into, at tree-ssa-threadedge.c:623

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58340

--- Comment #23 from Jeffrey A. Law <law at redhat dot com> ---
Obviously in a bootstrap comparison failure we have a situation where the
compiler has mis-compiled itself or something similar.  Ultimately I need to be
able to reproduce the failure.  So far I've been unable to do so on the ia64
boxes I have direct access to.  Note I'm just doing a "configure; make", so if
you're using different options, I'd need to know about those.

Alternate approaches would be for you to make a box available which exhibits
the problem or for you to help more with the debugging by identifying what
file/module is getting mis-compiled.  As you probably know, it's rarely the
file showing the comparison failure.