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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Possible bug in std::sort"
href="https://bugs.llvm.org/show_bug.cgi?id=47903">47903</a>
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<th>Summary</th>
<td>Possible bug in std::sort
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
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<th>Version</th>
<td>10.0
</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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>All Bugs
</td>
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<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>alexandru.croitor@qt.io
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=24076" name="attach_24076" title="std::sort crash repro">attachment 24076</a> <a href="attachment.cgi?id=24076&action=edit" title="std::sort crash repro">[details]</a></span>
std::sort crash repro
Hi, I may? have found a bug in libc++'s std::sort() that causes a craash.
I didn't dig too deep except for creating a minimal repro.
Stumbled upon this as part of a bigger project (Qt Creator), but reduced it to
the code in the attachment.
Reproduced it on macOS 10.15.7 + Xcode 11.6 Build version 11E708
As well as Ubuntu 18.04 clang 10.0.0 (unpackaged from releases.llvm.org) + a
self-built libc++ from git master ( 86ef379800162e5d6bb0d478c5bfb4b56498a272 )
building with the following script
$ cat make.sh
#!/bin/sh -x
export PREFIX=/home/alex/Dev/llvm-project/build/installed
export CLANG_PREFIX=/home/alex/Dev/clang10/bin
export CFLAGS="-nostdinc++ -I$PREFIX/include/c++/v1"
export LFLAGS="-L$PREFIX/lib -Wl,-rpath,$PREFIX/lib -nostdlib++ -lc++"
$CLANG_PREFIX/clang++ -c -pipe $CFLAGS -O2 -std=gnu++11 -Wall -Wextra -o
main.o ../main.cpp
$CLANG_PREFIX/clang++ -ccc-gcc-name g++ $LFLAGS -o proj main.o -v</pre>
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