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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - detect non-strick-weak-order where one is required"
href="http://llvm.org/bugs/show_bug.cgi?id=21389">21389</a>
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<th>Summary</th>
<td>detect non-strick-weak-order where one is required
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</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>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
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<th>Reporter</th>
<td>nlewycky@google.com
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</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>The static analyzer should flag this sort of code:
std::nth_element(
id_map.begin(),
id_map.begin() + num_ids,
id_map.end(), [](const pair<Id, float> &lhs,
const pair<Id, float> &rhs) {
return lhs.second <= rhs.second;
});
because the lambda function may return true for a given pair of inputs, and
return true again if you switch lhs and rhs.</pre>
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