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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang++ fails early initialization for function static variable"
href="https://bugs.llvm.org/show_bug.cgi?id=38745">38745</a>
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<th>Summary</th>
<td>clang++ fails early initialization for function static variable
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>6.0
</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>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>timj@gnu.org
</td>
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20790" name="attach_20790" title="Demo for lack of initialization of a static variable at function scope">attachment 20790</a> <a href="attachment.cgi?id=20790&action=edit" title="Demo for lack of initialization of a static variable at function scope">[details]</a></span>
Demo for lack of initialization of a static variable at function scope
Code generated with clang version 4.0.1-6 or 6.0.0-1ubuntu2 crashes due to an
uninitialized unordered_map during execution of static ctors. The map should
have been initialized as a static variable during the first call to a singleton
accessor.
Various g++ versions (tested up to 7.2.0) produce properly working code for the
attached test case.
Note that moving the static unordered_map out of the singleton function into
global scope works and doesn't trigger the issue.</pre>
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