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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 accepts invalid covariant override"
href="https://llvm.org/bugs/show_bug.cgi?id=23411">23411</a>
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<th>Summary</th>
<td>Clang accepts invalid covariant override
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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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>
</tr>
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<th>Status</th>
<td>NEW
</td>
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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>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>consider:
struct W {};
struct X : W {};
struct Y : W {};
struct Z : X, Y {};
struct A {
virtual W *f();
};
struct B : virtual A {
virtual X *f();
};
struct C : virtual A {
virtual Y *f();
};
struct D : B, C {
virtual Z *f();
};
this is invalid because D::f returns a pointer to Z. 'W' is not an unambiguous
indirect base of 'Z' which makes this invalid.</pre>
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