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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Crash when explicitly instantiating a class template with a protected defaulted dtor, after a use of that dtor"
href="http://llvm.org/bugs/show_bug.cgi?id=22793">22793</a>
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<th>Summary</th>
<td>Crash when explicitly instantiating a class template with a protected defaulted dtor, after a use of that dtor
</td>
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Keywords</th>
<td>compile-fail
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++11
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dblaikie@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
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<pre>The most basic repro I can come up with is:
template <typename>
struct foo {
protected:
~foo() = default;
friend void func();
};
void func() { foo<int> f; }
template struct foo<int>;
(including an explicit instantiation declaration before the definition of
'func' doesn't help, FWIW)
Other ways to call ~foo<int> still produce the problem - eg: deriving from
foo<int> and having a user-defined dtor or ctor, even if they're never called.
Making the dtor public instead of protected avoids the crash
Defining the dtor as {} instead of "= default" avoids the crash.
This came up in a Clang self-host (reported as PR22791, among other instances).</pre>
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