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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 - segfault/deadlock with default lambda argument to generic lambda"
href="https://bugs.llvm.org/show_bug.cgi?id=34706">34706</a>
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<th>Summary</th>
<td>segfault/deadlock with default lambda argument to generic lambda
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++14
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>diagonaldevice@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>#include <functional>
int main(int argc, char *argv[])
{
auto warning = [](
auto point,
std::function<void()> additional_output = []{}
) { };
warning(0.0);
}
The outcome of compilation is nondeterministic.
On my machine, compiling it 100 times, I got:
- 86 times: compiler segfault (see attachments)
- 11 times: successful compilation
- 3 times: compiler deadlocks? No output, have to hit Ctrl-C to abort
It seems (but I am not certain due to the nondeterministism)
that any of the following modifications to the test input cause
it to stop reproducing the deadlock/segfault:
- Changing 'point' to 'double'
- Changing 'additional_output' to 'auto'
- Changing the call to 'warning(0.0, []{});'</pre>
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