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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Emit warning for initializing a reference with literal/temporary"
href="https://bugs.llvm.org/show_bug.cgi?id=32800">32800</a>
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<th>Summary</th>
<td>Emit warning for initializing a reference with literal/temporary
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>clang@martinien.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
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<pre>Hi,
would it be possible to emit a warning for the code below? I could imagine this
case could be detected easily in the frontend / middleend.
ASan finds this with detect_stack_use_after_return enabled, but this option is
sometimes not feasible due to high memory usage.
struct RefStorer
{
RefStorer(const bool& ref): m_ref(ref) {}
const bool& m_ref;
};
RefStorer getRefStorer()
{
return RefStorer(false); // false passed as reference
}
int main()
{
RefStorer r = getRefStorer(); // m_ref now dangling
return 0;
}
Additionally such cases should also be handled:
RefStorer getRefStorer()
{
bool b = false;
return RefStorer(b);
}
Best regards,
Martin</pre>
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