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[Bug c++/48834] New: [4.7 Regression] -fno-exceptions causes wrong code generation on C++ code
- From: "zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 30 Apr 2011 14:03:18 +0000
- Subject: [Bug c++/48834] New: [4.7 Regression] -fno-exceptions causes wrong code generation on C++ code
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48834
Summary: [4.7 Regression] -fno-exceptions causes wrong code
generation on C++ code
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: zsojka@seznam.cz
CC: jason@gcc.gnu.org
Host: x86_64-pc-linux-gnu
Target: x86_64-pc-linux-gnu
Created attachment 24150
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24150
reduced testcase
Compiler flags:
$ g++ testcase.C -fno-exceptions
Output (simplified):
$ g++ testcase.C -fno-exceptions -Wall -W -g
testcase.C: In function 'int main()':
testcase.C:6:4: warning: unused variable 's' [-Wunused-variable]
testcase.C:6:15: warning: 's' is used uninitialized in this function
[-Wuninitialized]
$ valgrind -q ./a.out
==17173== Use of uninitialised value of size 8
==17173== at 0x40060C: S::S() (testcase.C:2)
==17173== by 0x4005DE: main (testcase.C:6)
==17173==
==17173==
==17173== Process terminating with default action of signal 11 (SIGSEGV)
==17173== Bad permissions for mapped region at address 0x4004D0
==17173== at 0x40060C: S::S() (testcase.C:2)
==17173== by 0x4005DE: main (testcase.C:6)
Segmentation fault
This seems to be a recent regression.
Tested revisions:
r173182 - fail
4.6 r173059 - OK