[LLVMbugs] [Bug 17543] New: Sporadic segmentation faults with r192398

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=17543

            Bug ID: 17543
           Summary: Sporadic segmentation faults with r192398
           Product: dragonegg
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: New Bugs
          Assignee: baldrick at free.fr
          Reporter: scott+llvm+bugzilla at pakin.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Created attachment 11358
  --> http://llvm.org/bugs/attachment.cgi?id=11358&action=edit
Valgrind analysis of DragonEgg

Here's the error I'm getting, but not every time I run the command -- just
often enough to be annoying:

$ /usr/bin/g++ -I/tmp/byfl-build/byfl/build/../include
-I/tmp/byfl-build/byfl/build/include -I/tmp/byfl-build/byfl/build/lib/byfl
-I/tmp/byfl-build/byfl/lib/byfl -I/tmp/byfl-build/llvm/include  -DNDEBUG
-D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -O3 -fomit-frame-pointer -g -fno-exceptions -fno-rtti
-fPIC -g -O2 -std=c++11 -I/tmp/byfl-build/byfl/build/../lib/include  -pedantic
/tmp/byfl-build/byfl/lib/byfl/byfl.cpp -o
/tmp/byfl-build/byfl/build/lib/byfl/Release+Debug/byfl.ll -S
-fplugin=/tmp/byfl-install/lib/dragonegg.so -fplugin-arg-dragonegg-emit-ir
'-cmpxchg16b' is not a recognized feature for this target (ignoring feature)
'-cmpxchg16b' is not a recognized feature for this target (ignoring feature)
Stack dump:
0.    Running pass 'Unnamed pass: implement Pass::getPassName()' on module
'/tmp/byfl-build/byfl/lib/byfl/byfl.cpp'.
*** WARNING *** there are active plugins, do not report this as a bug unless
you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_FINISH_UNIT               | dragonegg
PLUGIN_FINISH                    | dragonegg
PLUGIN_START_UNIT                | dragonegg
PLUGIN_ALL_IPA_PASSES_END        | dragonegg
/tmp/byfl-build/byfl/lib/byfl/byfl.cpp:1143:1: internal compiler error:
Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-4.7/README.Bugs> for instructions.
Preprocessed source stored into /tmp/ccidjVqe.out file, please attach this to
your bugreport.
$ g++ --version | head -1
g++ (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3

I wasn't able to get the error to trigger when running from within gdb, but I
did attach a Valgrind report of the preceding command in case it's of any use
in tracking down the problem.

The source file, byfl.cpp, is part of my Byfl tool
(https://github.com/losalamos/Byfl, Git commit e420a70a53).

Thanks,
-- Scott

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