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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang frontend segfault when multiple make jobs running concurrently"
href="https://bugs.llvm.org/show_bug.cgi?id=44281">44281</a>
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<th>Summary</th>
<td>clang frontend segfault when multiple make jobs running concurrently
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>9.0
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jeff.linahan@gmail.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=22933" name="attach_22933" title="clang concurrent make segfault output">attachment 22933</a> <a href="attachment.cgi?id=22933&action=edit" title="clang concurrent make segfault output">[details]</a></span>
clang concurrent make segfault output
I think clang-9 appears to be trying to execute a command called "Segmentation
fault (core dumped)" but I don't see a core file anywhere (even with ulimit -c
unlimited) Workaround is to just run make without -j so I think it has
something to do with the frontend receiving some sort of signal when multiple
processes are kicked off. I have no better idea what's going on without the
core file so here's my source code and steps to reproduce:
On Manjaro Linux 4.19.85 and clang 9.0.0:
$ git clone <a href="https://github.com/jeffythedragonslayer/lipton-tarjan.git">https://github.com/jeffythedragonslayer/lipton-tarjan.git</a>
$ cd lipton-tarjan
$ make -j 16</pre>
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