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<body><span class="vcard"><a class="email" href="mailto:vsk@apple.com" title="Vedant Kumar <vsk@apple.com>"> <span class="fn">Vedant Kumar</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - UBSAN binary segfaults on correct UB-free test case."
href="https://bugs.llvm.org/show_bug.cgi?id=32646">bug 32646</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>vsk@apple.com
</td>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>unassignedbugs@nondot.org
</td>
<td>vsk@apple.com
</td>
</tr>
<tr>
<td style="text-align:right;">Severity</td>
<td>enhancement
</td>
<td>normal
</td>
</tr>
<tr>
<td style="text-align:right;">Product</td>
<td>libraries
</td>
<td>clang
</td>
</tr>
<tr>
<td style="text-align:right;">Component</td>
<td>Miscellaneous Instrumentation passes
</td>
<td>LLVM Codegen
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
</tr></table>
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<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - UBSAN binary segfaults on correct UB-free test case."
href="https://bugs.llvm.org/show_bug.cgi?id=32646#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - UBSAN binary segfaults on correct UB-free test case."
href="https://bugs.llvm.org/show_bug.cgi?id=32646">bug 32646</a>
from <span class="vcard"><a class="email" href="mailto:vsk@apple.com" title="Vedant Kumar <vsk@apple.com>"> <span class="fn">Vedant Kumar</span></a>
</span></b>
<pre>It's crashing while trying to write to the stack:
-> 0x102ace7fc <+44878268>: movq %rsi, -0x802080(%rbp)
I worked around the crash by increasing the stack size limit. On macOS, that's:
$ ulimit -s 65532
Another workaround might be to compile with -O1 or greater.</pre>
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