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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - dynamic_cast to virtual base with multiple access control"
href="https://bugs.llvm.org/show_bug.cgi?id=35462">35462</a>
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<th>Summary</th>
<td>dynamic_cast to virtual base with multiple access control
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>5.0
</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
</td>
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<th>Component</th>
<td>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>stephane.zimmermann@trust-in-soft.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<p>
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<pre>The following code:
struct Foo {
int x = 42;
virtual void f() {}
};
struct PublicBar: public virtual Foo { };
struct PrivateBar: private virtual Foo { };
struct EntryPoint {
virtual void g() {}
};
struct Baz: PublicBar, PrivateBar, EntryPoint {};
int main(void) {
Baz b;
EntryPoint *e = &b;
Foo *f = dynamic_cast<Foo *>(e);
return f->x;
}
when compiled and executed causes a segmentation fault because the dynamic_cast
is failing.
The dynamic cast should not fail, as the Foo base is unique because it is
virtual and is accessible because of the path PublicBar::Foo.</pre>
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