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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - optimization generates a segfault or bus error"
href="https://llvm.org/bugs/show_bug.cgi?id=27178">27178</a>
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<th>Summary</th>
<td>optimization generates a segfault or bus error
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>pavel.sakov@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>- Optimized binary with -O1 or -O2 generates a segfault or bus error on two
different installations (opensuse Leap 42.1 and 13.2), but not on opensuse 13.1
- Non-optimized binary runs cleanly
- Linking with -ldmalloc finds no memory issues
- Compiled with gcc, either optimized or not, the binary runs cleanly
Platform:
pavel@sparse{gridutils}uname -a
Linux sparse 4.4.1-2.gddc5d70-default #1 SMP PREEMPT Tue Feb 2 16:31:39 UTC
2016 (ddc5d70) x86_64 x86_64 x86_64 GNU/Linux
pavel@sparse{gridutils}clang --version
clang version 3.7.0 (tags/RELEASE_370/final 246586)
Target: x86_64-suse-linux
Thread model: posix
How to reproduce:
1. svn checkout <a href="https://github.com/sakov/gridutils-c">https://github.com/sakov/gridutils-c</a>
2. cd gridutils-c/trunk/gridutils
3. ./configure
4. make
5. cd test
6. ../getnodes gridpoints_DD-raw.txt -i DD -o DD -v > gridpoints_DD.txt
7. ../getnodes gridpoints_DD.txt -i DD -o CO > gridpoints_CO.txt
8. ../getnodes gridpoints_CO.txt -i CO -o CE > gridpoints_CE.txt
9. ../getnodes gridpoints_CE.txt -i CE -o CO > gridpoints_CO2.txt
gets: Segmentation fault
Cheers,
Pavel Sakov</pre>
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