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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - auto function return the reference of a local variable not the value"
href="https://bugs.llvm.org/show_bug.cgi?id=47702">47702</a>
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<th>Summary</th>
<td>auto function return the reference of a local variable not the value
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>11.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>tangyixuan@mail.dlut.edu.cn
</td>
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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>Hi, the following code returns the value of a local variable instead of the
reference address. At first I though it was a gcc bug and reported it to gcc.
Maybe is miscompiled by clang.
#include <iostream>
auto func(const int a) {
const int b = a;
return [&](){ return b; };
}
int main() {
auto c = func(1);
std::cout << c() ;
return 0;
}
$ g++ -std=c++2a s.cpp
$ ./a.out
32765
$ clang++ -std=c++2a s.cpp
$ ./a.out
1
reference: <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97256">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97256</a></pre>
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