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<body><span class="vcard"><a class="email" href="mailto:vince.a.bridgers@gmail.com" title="Vince Bridgers <vince.a.bridgers@gmail.com>"> <span class="fn">Vince Bridgers</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Segmentation fault when running check-clang-python with UBSan"
href="https://bugs.llvm.org/show_bug.cgi?id=39559">bug 39559</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>RESOLVED
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<td style="text-align:right;">CC</td>
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<td>vince.a.bridgers@gmail.com
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>WORKSFORME
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Segmentation fault when running check-clang-python with UBSan"
href="https://bugs.llvm.org/show_bug.cgi?id=39559#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Segmentation fault when running check-clang-python with UBSan"
href="https://bugs.llvm.org/show_bug.cgi?id=39559">bug 39559</a>
from <span class="vcard"><a class="email" href="mailto:vince.a.bridgers@gmail.com" title="Vince Bridgers <vince.a.bridgers@gmail.com>"> <span class="fn">Vince Bridgers</span></a>
</span></b>
<pre>I looked into this, and am not able to repro under currently documented build
environment. I was able to repro under very particular build/run environments,
so I suspect David encountered one or the other issue that leads to this
segfault. This problem can occur due to 1 of the following reasons:
1) LLVM compiler built with LLVM_ENABLE_PIC=on. There was a patch created to
disable Python bindings under these conditions at some point. Perhaps this was
the problem at the time.
2) Perhaps a problem with the Python version used - I'm guessing this was the
problem in the original report.
This problem has been reported a few times, and there have been different
approaches to addressing this. If a reader comes across this issue looking for
a solution, please look at those and also check out the following references.
References …
Python binding tests disabled when LLVM_ENABLE_PIC=OFF
<a href="https://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20190114/257720.html">https://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20190114/257720.html</a>
Appears to be caused by a regression in Python. See
<a href="https://bugs.python.org/issue37140">https://bugs.python.org/issue37140</a></pre>
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