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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - fatal error: parser recursion limit reached when using deeply nested parentheses"
href="http://llvm.org/bugs/show_bug.cgi?id=15195">15195</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>fatal error: parser recursion limit reached when using deeply nested parentheses
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.2
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>darwin.driggers@sas.com
</td>
</tr>
<tr>
<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=9977" name="attach_9977" title="Standalone source code to replicate the error message">attachment 9977</a> <a href="attachment.cgi?id=9977&action=edit" title="Standalone source code to replicate the error message">[details]</a></span>
Standalone source code to replicate the error message
The exact error is:
clang -c x2.c
x2.c:5389:3: fatal error: parser recursion limit reached, program too complex
{ FOO_VERSIONLONG}, /* fixed index is 334*/
^
x2.c:4871:31: note: expanded from macro 'FOO_VERSIONLONG'
#define FOO_VERSIONLONG (FOO_VERSIONLONG_IDXXX|MYFLAG)
^
x2.c:584:36: note: expanded from macro 'FOO_VERSIONLONG_IDXXX'
#define FOO_VERSIONLONG_IDXXX (FOO_VBUFSIZE_IDXXX + 1)
^
Clang version info:
clang version 3.2 (tags/RELEASE_32/final)
Target: x86_64-apple-darwin11.4.2
Thread model: posix
The above error is present in the 3.2 production version of clang and with the
latest(Feb. 05, 2013) build using the source from trunk.
I was able to checkout the source for clang version 3.2 and the current trunk
and make the following change in clang/lib/Parse/RAIIObjectsForParser.h, line
374, to get around the error:
enum { MaxDepth = 2048 }; // Increase MaxDepth
Please increase MaxDepth to a minimum of 2k.
I've verified the problem exists on MacOS X and Linux.
This bug/enhancement request appears related to <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang crashes from gcc torture test limits-structnest.c"
href="show_bug.cgi?id=10752">bug 10752</a>.</pre>
</div>
</p>
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