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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - r372359 causes stack overflow parsing large array"
href="https://bugs.llvm.org/show_bug.cgi?id=45333">45333</a>
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<th>Summary</th>
<td>r372359 causes stack overflow parsing large array
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>10.0
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<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>smeenai@fb.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk, tstellar@redhat.com
</td>
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<th>Blocks</th>
<td>45309
</td>
</tr></table>
<p>
<div>
<pre>We have some generated code which creates a large std::array. After r372359,
clang appears to call AnalyzeImplicitConversions recursively for each array
element, which leads to a stack overflow for a sufficiently large array. Simple
repro:
$ python -c "print '#include <array>\n static constexpr std::array a {\n %s
\n};' % ',\n '.join(['0.0f']*65536)" > /tmp/test.cpp
$ clang -std=c++17 -fsyntax-only /tmp/test.cpp
Explicitly passing the size of the array (std::array<float, n>) avoids this,
but it's still a regression from Clang 9.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [meta] 10.0.1 Release Blockers"
href="https://bugs.llvm.org/show_bug.cgi?id=45309">Bug 45309</a>] [meta] 10.0.1 Release Blockers
</li>
</ul>
</div>
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