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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ADL broken with clang 13.0.0"
href="https://bugs.llvm.org/show_bug.cgi?id=52454">52454</a>
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<th>Summary</th>
<td>ADL broken with clang 13.0.0
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>13.0
</td>
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<th>Hardware</th>
<td>PC
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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>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dodoentertainment@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Here is the Godbolt link that reproduces the issue that I've stumbled upon in
my codebase: <a href="https://godbolt.org/z/ocMdcxj89">https://godbolt.org/z/ocMdcxj89</a>
Namely, the code uses ADL to inject a custom implementation of swap for the
boost iterator_facade (the swap is needed for `std::sort` to work).
This works great on GCC and MSVC and worked also on clang until v13.0.0 when it
stopped working.
You can see the error in the above Godbolt link.
Interestingly, if I replace `std::sort` with `boost::sort::pdqsort`, the same
implementation of swap can now be found using ADL.
You can see this in this example: <a href="https://godbolt.org/z/r8eMbY5r4">https://godbolt.org/z/r8eMbY5r4</a></pre>
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