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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - string_view::remove_prefix, remove_suffix should leave n > size() UB"
href="http://llvm.org/bugs/show_bug.cgi?id=21496">21496</a>
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<th>Summary</th>
<td>string_view::remove_prefix, remove_suffix should leave n > size() UB
</td>
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<th>Product</th>
<td>libc++
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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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>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>lichray@gmail.com
</td>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>They have explicit narrow contract:
Requires: n <= size()
, but the libc++ made them work same as n == size(), which creates portability
problems. For reference, libstdc++'s remove_prefix is guarded by assertion,
remove_suffix is just `this->_M_len -= __n;` (which may worth to be guarded as
well, but that's their problem).</pre>
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