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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Windows] Assigning a base class pointer to a derived class causes an assertion in clang"
href="https://bugs.llvm.org/show_bug.cgi?id=37947">37947</a>
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<th>Summary</th>
<td>[Windows] Assigning a base class pointer to a derived class causes an assertion in clang
</td>
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<th>Product</th>
<td>clang
</td>
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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>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
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<th>Reporter</th>
<td>stilis@microsoft.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>This reproduces when trying to run one of the LLDB tests on Windows
(specifically, TestCallOverriddenMethod.py).
To reproduce:
1) Build Clang on Windows with LLVM_ENABLE_ASSERTIONS=ON
2) Build the source for TestCallOverriddenMethod.py
Result:
Assertion failed: Prior->Kind == MemberInfo::Field && !Prior->FD && "Only
storage fields have tail padding!", file
e:\_work\1\s\llvm\tools\clang\lib\codegen\cgrecordlayoutbuilder.cpp, line 596
The source for the test is:
```
class Base {
public:
virtual ~Base() {}
virtual void foo() {}
};
class Derived : public Base {
public:
virtual void foo() {}
};
int main() {
Derived d;
Base *b = &d;
return 0; // Set breakpoint here
}
```</pre>
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</p>
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