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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 - code compiles (and segfaults) with gcc, but does not compile with clang"
href="https://bugs.llvm.org/show_bug.cgi?id=47638">47638</a>
</td>
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<th>Summary</th>
<td>code compiles (and segfaults) with gcc, but does not compile with clang
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>10.0
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++2a
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>janezz55@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
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<p>
<div>
<pre>struct S
{
auto f()
{
return [](){};
}
template <typename U = S>
using FP = decltype(&U::f);
};
int main()
{
(S().*S::FP<>())();
return 0;
}
<a href="https://wandbox.org/permlink/ZjerOK6U3svPXXfE">https://wandbox.org/permlink/ZjerOK6U3svPXXfE</a>
This code will compile (and segfault) with gcc 10.1, but will not compile with
clang 10.0.0. I think it's valid code. Playing with parentheses did not work
for me.
prog.cc:15:7: error: invalid use of pointer to member type after .*
(S().*S::FP<>())();
^
1 error generated.</pre>
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