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Description of problem: ICE during tetex compilation. Version-Release number of selected component (if applicable): gcc34-3.4.0-0.6 How reproducible: 100% Steps to Reproduce: 1. g++34 -O2 -c input.cc Actual results: GlobalParams.cc: In member function `void GlobalParams::parseFile(GString*, FILE*)': GlobalParams.cc:426: internal compiler error: Segmentation fault Please submit a full bug report, with preprocessed source if appropriate. See <URL:http://gcc.gnu.org/bugs.html> for instructions. Preprocessed source stored into /tmp/ccdJyp5G.out file, please attach this to your bugreport Additional info: Not triggered with -O1. See attached input.cc.
Created attachment 98368 [details] input.cc
Simplified into: // { dg-do compile } // { dg-options "-O2" } extern char *foo (char *, int); struct A { int i; void bar (char *); }; struct B { B (); void baz (void *); }; struct C { C (const char *, int); }; void A::bar (char *a) { B *b; char *p1, *p2 = a + 512; while (foo (a, 511)) { b = new B (); p1 = a; while (*p1) { b->baz (new C (p1, p2 - p1)); p1 = *p2 ? p2 + 1 : p2; } } } Both this testcase and your original testcase don't ICE in gcc-c++-3.4-0.3 though, so it is apparently something newly introduced. But certainly present on vanilla gcc-3_4-branch as of today.
Tracked upstream http://gcc.gnu.org/bugzilla/PR14527