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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [WinEH] invalid exception object in catch handler"
href="https://llvm.org/bugs/show_bug.cgi?id=26757">26757</a>
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<th>Summary</th>
<td>[WinEH] invalid exception object in catch handler
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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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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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>r.sagitario@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The attached IR is generated by enabling optimization in the D compiler, but
generates code that crashes in the continuation of the catch handler because
the exception object is invalid.
The stack offset for the exception object in the handlerMap is 0, see the
respective asm:
$handlerMap$0$__D3enf15__unittestL11_1FZv:
.long 0
.long _Dobject.Exception@TypeDescriptor
.long 0
.long "?catch$4@?0?__D3enf15__unittestL11_1FZv@4HA"
This is rejected by the VC runtime in int __BuildCatchObjectHelper(),
HT_DISPCATCH(*pCatch) is 0:
// If the catch is by ellipsis, then there is no object to construct.
// If the catch is by type(No Catch Object), then leave too!
if (HT_IS_TYPE_ELLIPSIS(*pCatch) ||
(!HT_DISPCATCH(*pCatch) && !HT_ISCOMPLUSEH(*pCatch))) {
EHTRACE_EXIT;
return 0;
}</pre>
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</p>
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