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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::string_view encourages use-after-free"
href="https://bugs.llvm.org/show_bug.cgi?id=34729">34729</a>
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<th>Summary</th>
<td>std::string_view encourages use-after-free
</td>
</tr>
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<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>unspecified
</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>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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</tr>
<tr>
<th>Reporter</th>
<td>kcc@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>eric@efcs.ca, llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<pre>% cat string_view_uaf.cc
#include <iostream>
#include <string>
#include <string_view>
int main() {
std::string s = "Hellooooooooooooooo ";
std::string_view sv = s + "World\n";
std::cout << sv;
}
% clang++ -std=c++11 string_view_uaf.cc -stdlib=libc++ -fsanitize=address &&
./a.out
?ooooooooooooooo World
=================================================================
==15854==ERROR: AddressSanitizer: heap-use-after-free
I don't know if this is a libc++ bug or a C++17 feature, please advise.</pre>
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