<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 - False positive -Wreturn-stack-address warning with optional"
href="https://bugs.llvm.org/show_bug.cgi?id=44003">44003</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>False positive -Wreturn-stack-address warning with optional
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rogero@howzatt.demon.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>The following code, with clang trunk and -std=c++17, produces a warning that I
believe to be a false positive.
---- code ----
#include <optional>
#include <string_view>
std::string_view foo()
{
std::optional<std::string_view> sv("abc");
return *sv; // unwanted [-Wreturn-stack-address] warning
}
---- code ----
See <a href="https://godbolt.org/z/vTs3Kk">https://godbolt.org/z/vTs3Kk</a>
This is a regression since clang 9.0</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>