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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - front end crash when using variadic concepts requirement with "or" statement (trunk/11)"
href="https://bugs.llvm.org/show_bug.cgi?id=48656">48656</a>
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<th>Summary</th>
<td>front end crash when using variadic concepts requirement with "or" statement (trunk/11)
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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>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>release blocker
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++2a
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ryan_greenblatt@brown.edu
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24341" name="attach_24341" title="crashes">attachment 24341</a> <a href="attachment.cgi?id=24341&action=edit" title="crashes">[details]</a></span>
crashes
This crash occurs on trunk and on 11 with `clang++ -std=c++20 FILENAME`.
I think I have a pretty minimal reproduction.
```
template <unsigned> struct A { static constexpr bool a = true; };
template <typename T>
concept BoolOrRequirement = requires {
requires requires {
// any requirement (outside of a few trivial ones)
T::b;
} || T::a;
};
template <BoolOrRequirement...>
struct B {};
int main() {
// need at least 2 elements for crash, more elements seems to increase
// consistancy of crash
B<A<0>, A<1>, A<2>, A<3>, A<4>> value;
}
```
Here is a godbolt link: <a href="https://godbolt.org/z/vz7Wss">https://godbolt.org/z/vz7Wss</a>.
I have also attached the source file.</pre>
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