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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [fuzz] Assertion `!Unexpanded.empty() && "Unable to find unexpanded parameter packs"' failed."
href="http://llvm.org/bugs/show_bug.cgi?id=21826">21826</a>
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<th>Summary</th>
<td>[fuzz] Assertion `!Unexpanded.empty() && "Unable to find unexpanded parameter packs"' failed.
</td>
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<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<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>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sami.liedes@iki.fi
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13467" name="attach_13467" title="test case">attachment 13467</a> <a href="attachment.cgi?id=13467&action=edit" title="test case">[details]</a></span>
test case
Fuzzing discovered that the attached test case, when given as input to
clang -fno-crash-diagnostics -std=c++11 -xc++ -c -emit-llvm
causes this assertion failure:
unexpanded-parm-pack.cpp:1:24: error: expected ']'
template <int... N> a[N
^
unexpanded-parm-pack.cpp:1:22: note: to match this '['
template <int... N> a[N
^
unexpanded-parm-pack.cpp:1:21: error: C++ requires a type specifier for all
declarations
template <int... N> a[N
^
clang-3.6: tools/clang/lib/Sema/SemaTemplateVariadic.cpp:281: bool
clang::Sema::DiagnoseUnexpandedParameterPack(clang::SourceLocation,
clang::TypeSourceInfo *, clang::Sema::UnexpandedParameterPackContext):
Assertion `!Unexpanded.empty() && "Unable to find unexpanded parameter packs"'
failed.</pre>
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