Bug 38466
| Summary: | g++ segfaults when compiling with -O2 | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | bastiaan |
| Component: | gcc | Assignee: | Jakub Jelinek <jakub> |
| Status: | CLOSED RAWHIDE | QA Contact: | David Lawrence <dkl> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.1 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2001-05-02 11:43:40 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
The example I gave can be shortened to only 5 lines with the same results:
struct CrashMe {
CrashMe* self() { try { return this; } catch(...) {} };
void nuke();
};
void CrashMe::nuke() { self()->nuke(); }
Yeah, I've simplified it similarly. It is a sibling call optimization issue wrt. exception handling, compiling with -O2 -fno-optimize-sibling-calls should work. I'm debugging it ATM. Should be fixed by http://gcc.gnu.org/ml/gcc-patches/2001-05/msg00082.html I'll put it into gcc-c++-2.96-83 if it passes all the tests. |
From Bugzilla Helper: User-Agent: Mozilla/4.76 [en] (X11; U; Linux 2.4.2-2 i686) g++ segfaults when compiling with '-O2'. Without optimization or with '-O', it compiles without problems. Reproducible: Always Steps to Reproduce: 1. cat << EOF > crashme.cc void someFunction(); struct ClassA { inline ClassA(int dummy) { someFunction(); }; inline ~ClassA() { try { someFunction(); } catch (...) { } }; }; struct ClassB { void methodA(bool flag); void methodB(); static ClassB* instance() { int dummy; ClassA classA(dummy); return (ClassB*)0; }; }; void ClassB::methodA(bool flag) { instance()->methodB(); } EOF 2. g++ -O2 crashme.cc Actual Results: $ g++ -O2 -c crash.cc crash.cc: In method `void ClassB::methodA (bool)': crash.cc:25: Internal error: Segmentation fault. Please submit a full bug report. See <URL:http://bugzilla.redhat.com/bugzilla/> for instructions. Expected Results: It should have been compiled without any errors. $ g++ -v Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs gcc version 2.96 20000731 (Red Hat Linux 7.1 2.96-81)