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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang-10 regression with __thread and deduction guides"
href="https://bugs.llvm.org/show_bug.cgi?id=45124">45124</a>
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<tr>
<th>Summary</th>
<td>clang-10 regression with __thread and deduction guides
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>10.0
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dmajor@mozilla.com
</td>
</tr>
<tr>
<th>CC</th>
<td>froydnj@gmail.com, htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk, sylvestre@debian.org
</td>
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<th>Blocks</th>
<td>44555
</td>
</tr></table>
<p>
<div>
<pre><a href="https://godbolt.org/z/9rQ5Mi">https://godbolt.org/z/9rQ5Mi</a>
template <typename> class a { int d; };
template <template <typename> class b> class c : b<int> {} ;
__thread c<a> g1;
struct x { ~x(); };
template <typename> class y { y(x = x()); };
template <typename z> y(z)->y<z>;
__thread c<a> g2;
`g1` compiles fine, but when a deduction guide is introduced, `g2` gives an
`error: initializer for thread-local variable must be a constant expression`
even though the deduction guide's classes have nothing to do with the
`__thread` variable's classes.</pre>
</div>
</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [meta] 10.0.0 Release Blockers"
href="https://bugs.llvm.org/show_bug.cgi?id=44555">Bug 44555</a>] [meta] 10.0.0 Release Blockers
</li>
</ul>
</div>
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