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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Link error on null result from getScope"
href="https://llvm.org/bugs/show_bug.cgi?id=26534">26534</a>
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<th>Summary</th>
<td>Link error on null result from getScope
</td>
</tr>
<tr>
<th>Product</th>
<td>tools
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</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>
</tr>
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<th>Component</th>
<td>llvm-link
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>alonzakai@gmail.com
</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>On line 1238 of IRMover.cpp,
if (auto *SP = getDISubprogram(dyn_cast<MDNode>(IE->getScope())))
I have seen a testcase where the dyn_cast fails as it receives a null pointer.
I don't understand this code enough to know if the fix is dyn_cast_or_null or
not.
I'm afraid the testcase I have is rather large. It's in the files provided in
this bugreport,
<a href="https://github.com/kripken/emscripten/issues/4078#issuecomment-180755159">https://github.com/kripken/emscripten/issues/4078#issuecomment-180755159</a>
And the steps to reproduce are to run
llvm-link libvsomeip.so -o linked.so
Stripping debug info and then linking avoids the problem, further confirming
it's a debuginfo issue.</pre>
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