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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Static member auto variable template with template-template parameter, inside struct with template-template parameter, crashes compiler"
href="https://bugs.llvm.org/show_bug.cgi?id=49741">49741</a>
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<th>Summary</th>
<td>Static member auto variable template with template-template parameter, inside struct with template-template parameter, crashes compiler
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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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
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>matthewjbarichello@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>Created <span class=""><a href="attachment.cgi?id=24697" name="attach_24697" title="Compiler crash backtrace">attachment 24697</a> <a href="attachment.cgi?id=24697&action=edit" title="Compiler crash backtrace">[details]</a></span>
Compiler crash backtrace
See attachment for compiler backtrace.
Affected versions:
- trunk
- 11.0.1
- 11.0.0
- 10.0.1
- 10.0.0
- 9.0.1
- 9.0.0
Driver cmdline:
Note: For versions that do not support -std=c++20, -std=c++2a was used.
clang++ -Xclang -disable-llvm-passes -std=c++20
Note: The original code has been reduced with creduce.
Reduced code:
template <template <typename> typename> struct a {
template <template <typename> typename> static auto const b = false;
};
template <typename> struct c;
int main() { a<c>::b<c>; }
Original code:
template<template<typename...> typename T>
struct Receiver {
template<template<typename...> typename Other>
static constexpr auto const value = false;
};
template<typename...>
struct A;
void f(auto) {}
int main() {
f(Receiver<A>::value<A>);
return 0;
}</pre>
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