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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang assertion failure on template instantiation"
href="https://llvm.org/bugs/show_bug.cgi?id=25561">25561</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Clang assertion failure on template instantiation
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rtrieu@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>ismail.pazarbasi@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>In clang::Sema::ActOnExplicitInstantiation in lib/Sema/SemaTemplate.cpp:7259,
Clang hits an assertion when attempting to cast a TemplateDecl to a
ClassTemplateDecl.
7259: ClassTemplateDecl *ClassTemplate = cast<ClassTemplateDecl>(TD);
test.cc:
class A {};
template <template <typename> class B>
class C {
template class B<A>;
};
clang -cc1 test.cc
clang: ../include/llvm/Support/Casting.h:237: typename cast_retty<X, Y
*>::ret_type llvm::cast(Y *) [X = clang::ClassTemplateDecl, Y =
clang::TemplateDecl]: Assertion `isa<X>(Val) && "cast<Ty>() argument of
incompatible type!"' failed.
...
Stack dump:
0. Program arguments: clang -cc1 test.cc
1. test.cc:4:22: current parser token ';'
2. test.cc:3:1: parsing struct/union/class body 'C'
Aborted (core dumped)</pre>
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