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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - no diagnostic issued for invalid friend declaration involving dependent member of the current instantiation"
href="https://bugs.llvm.org/show_bug.cgi?id=35377">35377</a>
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<th>Summary</th>
<td>no diagnostic issued for invalid friend declaration involving dependent member of the current instantiation
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</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>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
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</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>Testcase (inspired by testcase for gcc.gnu.org/PR65157):
template<typename T> struct A {
struct B;
template<typename U> struct C;
};
template <typename T>
struct A<T>::B {
template<typename U> void f();
};
template<typename T> template <typename U>
struct A<T>::C {
friend void B::f<U>();
};
template<> struct A<int>::B {};
A<int>::C<int> c;
This crashes during IR generation. The root cause is that the friend
declaration was marked invalid without any diagnostic being issued. It *is*
invalid (we aren't supposed to be looking up things within B, because it's a
dependent type, so it can't be given template arguments with <...>), but we
should actually produce an error saying so.</pre>
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