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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failed: !NodePtr->isKnownSentinel() with boost::intrusive_ptr on Windows"
href="https://bugs.llvm.org/show_bug.cgi?id=45033">45033</a>
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<th>Summary</th>
<td>Assertion failed: !NodePtr->isKnownSentinel() with boost::intrusive_ptr on Windows
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<tr>
<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>etienne@atnnn.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Created <span class=""><a href="attachment.cgi?id=23172" name="attach_23172" title="Minimal example">attachment 23172</a> <a href="attachment.cgi?id=23172&action=edit" title="Minimal example">[details]</a></span>
Minimal example
The following code seems to cause clang and clang-cl, 9.0.0 and trunk, to
crash:
intrusive_ptr<C> a;
try {
a = mk();
mk();
}
catch (...) {
}
Debug logs show
INSTCOMBINE ITERATION #1 on ?crash@@YAXXZ
IC: ADDING: 27 instrs to worklist
IC: Visiting: %call1 = invoke %struct.C* @"?mk@@YAPEAUC@@XZ"()
to label %invoke.cont2 unwind label %catch.dispatch
IC: Visiting: %a.sroa.0.0 = phi i64 [ %0, %invoke.cont2 ], [ 0, %entry ]
IC: Visiting: %1 = catchswitch within none [label %catch] unwind label
%ehcleanup
IC: Visiting: %2 = catchpad within %1 [i8* null, i32 64, i8* null]
IC: Visiting: catchret from %2 to label %try.cont
IC: Visiting: %a.sroa.0.1 = phi i64 [ %0, %invoke.cont2 ], [ %a.sroa.0.0,
%catch ]
IC: ADD: %a.sroa.0.1.ptr = phi %struct.C*
Assertion failed: !NodePtr->isKnownSentinel(), file
C:\src\llvm_package_2663a25f\llvm-project\llvm\include\llvm/ADT/ilist_iterator.h,
line 139
I've attached the logs and full trimmed down source.
Thanks.</pre>
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