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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - basic_string::operator= isn't exception safe"
href="https://llvm.org/bugs/show_bug.cgi?id=31779">31779</a>
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<th>Summary</th>
<td>basic_string::operator= isn't exception safe
</td>
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<th>Product</th>
<td>libc++
</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>All
</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>All Bugs
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>llvm-bugs@daryl.haresign.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Assigning one string to another, where they have non-equal
propagate-on-copy-assignment allocators, does a `clear()`, followed by an
`assign()`. The `assign()` may throw, which leaves the string in a cleared
state.
This seems to violate the requirement specified here:
<a href="http://eel.is/c++draft/basic.string#string.require-2">http://eel.is/c++draft/basic.string#string.require-2</a>
A contrived example to show this:
<a href="http://coliru.stacked-crooked.com/a/c43a723d04878890">http://coliru.stacked-crooked.com/a/c43a723d04878890</a></pre>
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</p>
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