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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Passing non-trivial type through variadic lambda does not trigger -Wnon-pod-varargs"
href="https://bugs.llvm.org/show_bug.cgi?id=42959">42959</a>
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<th>Summary</th>
<td>Passing non-trivial type through variadic lambda does not trigger -Wnon-pod-varargs
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>8.0
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<th>Hardware</th>
<td>PC
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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
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>idart@hotmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Tested with Clang 8.0.0 and 8.0.1 on Linux x86-64 (Devuan and CentOS) and the
version that ships with Xcode 10.3 on macOS (Mojave).
Compiled with "-stdlib=libc++ -std=c++17 -O2".
#include <functional>
#include <string>
int main() {
using Callback = std::function<void (const std::string&)>;
auto foo = [] (Callback fn, const std::string& arg) { fn(arg); };
foo([] (...) {}, "");
return 0;
}
This generate an invalid opcode (ud2) without any warnings or errors.
I'm not sure what I would expected to happen here. I would not expect the
silent generation of an invalid opcode though. The closest thing I could think
of was that this should trigger the -Wnon-pod-varargs error.</pre>
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