<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Constexpr variable template constructor initializing flexible array member crashes compiler"
href="https://bugs.llvm.org/show_bug.cgi?id=49742">49742</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Constexpr variable template constructor initializing flexible array member crashes compiler
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matthewjbarichello@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24699" name="attach_24699" title="Compiler crash backtrace">attachment 24699</a> <a href="attachment.cgi?id=24699&action=edit" title="Compiler crash backtrace">[details]</a></span>
Compiler crash backtrace
See attachment for compiler backtrace.
Affected versions:
Note: The issue seems to have been fixed in trunk already.
- 11.0.1
- 11.0.0
- 10.0.1
- 10.0.0
- 9.0.1
- 9.0.0
- 8.0.1
- 8.0.0
- 7.1.0
- 7.0.0
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:
struct a {
int b[];
template <typename... c> constexpr a(c... e) : b{e...} {}
};
int main() { constexpr a d{4}; }
Original code:
template<typename T>
struct S {
T t[];
template<typename... Args>
constexpr S(Args... args) noexcept :
t{args...}
{}
};
int main() {
constexpr const S<int> s{1, 2, 3, 4};
}</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>