[Bug c/55491] New: Segmentation fault

[Bug c/55491] New: Segmentation fault

[tom.day at amlin dot co.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

             Bug #: 55491
           Summary: Segmentation fault
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: tom.day@amlin.co.uk


Created attachment 28795
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28795
Preprocessed source required to reproduce error

Compilation of the attached produces segmentation fault error. GCC was invoked
using following command line:

gcc -O2 -mrtd conftest.c

Output is as follows:

conftest.c: In function 'e':
conftest.c:12:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Output from gcc -v is as follows:

Using built-in specs.
COLLECT_GCC=C:\MinGW472\bin\gcc.exe
COLLECT_LTO_WRAPPER=c:/mingw472/bin/../libexec/gcc/mingw32/4.7.2/lto-wrapper.exe
Target: mingw32
Configured with: ../gcc-4.7.2/configure
--enable-languages=c,c++,ada,fortran,objc,obj-c++ --disable-sjlj-exceptions
--with-dwarf2 --enable-shared --enable-libgomp --disable-win32-registry
--enable-libstdcxx-debug --disable-build-poststage1-with-cxx
--enable-version-specific-runtime-libs --build=mingw32 --prefix=/mingw
Thread model: win32
gcc version 4.7.2 (GCC) 

Preprocessed source is attached.

[Bug target/55491] Segmentation fault

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-27 16:13:51 UTC ---
The Obfuscated C Contest is this way: http://www.ioccc.org/

Why should anyone bother trying to work out what that does?

At least fix the warnings and see if the error goes away.

[Bug target/55491] Segmentation fault

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-11-27 16:15:22 UTC ---
Oh sorry I missed it causes an ICE, I thought the segfault was from the program
- apologies.

[Bug target/55491] Segmentation fault

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ktietz at gcc dot gnu.org
      Known to work|                            |4.8.0

--- Comment #3 from Kai Tietz <ktietz at gcc dot gnu.org> 2012-11-27 16:22:23 UTC ---
On 4.8.x testcase doesn't ICE.

[Bug target/55491] Segmentation fault

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

Mikael Pettersson <mikpe at it dot uu.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mikpe at it dot uu.se

--- Comment #4 from Mikael Pettersson <mikpe at it dot uu.se> 2012-11-27 17:38:01 UTC ---
I can't get it to ICE gcc-4.7.2 targeting x86_64-w64-mingw32 w/ -m32 -mrtd,
whether hosted on x86_64-linux or on i686-pc-cygwin.

[Bug target/55491] Segmentation fault

[tom.day at amlin dot co.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

--- Comment #5 from tom.day at amlin dot co.uk 2012-11-27 18:20:09 UTC ---
Thanks for comments and sorry if original post was at all unclear. The error I
got was from gcc hosted on mingw32 and, as per Mikael's comment, I noticed that
omitting the -O2 option made it run correctly.

[Bug target/55491] Segmentation fault

[mikpe at it dot uu.se]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

--- Comment #6 from Mikael Pettersson <mikpe at it dot uu.se> 2012-11-27 19:09:34 UTC ---
Actually my tests were with -O2 -m32 -mrtd; I only mentioned the "-m32 -mrtd"
part because the 64-bit target ignores -mrtd, one has to explicitly select the
32-bit target for -mrtd to have any effect.

[Bug target/55491] Segmentation fault

[tom.day at amlin dot co.uk]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

--- Comment #7 from tom.day at amlin dot co.uk 2012-11-28 10:29:51 UTC ---
Sorry Mikael, I'm with you now. I also don't get this error message when
targeting i686-w64-mingw32 when hosted on i686-linux-gnu.

[Bug target/55491] Segmentation fault

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55491

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #8 from Kai Tietz <ktietz at gcc dot gnu.org> ---
hmm, can't reproduce this for i686-w64-mingw32 for gcc 4.7, or gcc 4.8 series. 
I was using here cygwin-cross, and native compiler.  So I assume it might be
related to the release of this compiler.

So I close this bug as not reproduce-able for me.