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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - Segfault when using wrong macros in printf" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D23775&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=N3-NjJG35DSQosskmgCKqU5NWvdmdAXHaEr2ozBHzjo&s=epdy-jU1EFUYjUpESAm9hKyVwjquS0W2dMvh6qLFwQY&e=">23775</a>
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<th>Summary</th>
<td>Segfault when using wrong macros in printf
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>laochailan@web.de
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=14441" name="attach_14441" title="backtrace appearing after the printf error message is printed.">attachment 14441</a> <a href="attachment.cgi?id=14441&action=edit" title="backtrace appearing after the printf error message is printed.">[details]</a></span>
backtrace appearing after the printf error message is printed.
I stumbled on this segfault while programming. I do not know if it is really
related to the frontend.
Steps to Reproduce:
1) Attempt building the source code
2) clang crashes
3) Remove the printf in line 31498 and there is no segfault.
Build Date & Platform:
Arch Linux
$ clang --version
clang version 3.6.1 (tags/RELEASE_361/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix</pre>
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