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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Bogus "conversion would be valid if it was derived from" note with const mismatch"
href="https://bugs.llvm.org/show_bug.cgi?id=52014">52014</a>
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<th>Summary</th>
<td>Bogus "conversion would be valid if it was derived from" note with const mismatch
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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>Linux
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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
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>harald@gigawatt.nl
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
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<pre>The invalid code
typedef struct S s;
const s *f();
s *g() { return f(); }
results in
test.cc:3:17: error: cannot initialize return object of type 's *' (aka 'S
*') with an rvalue of type 'const s *' (aka 'const S *')
s *g() { return f(); }
^~~
test.cc:1:16: note: 'S' is not defined, but forward declared here; conversion
would be valid if it was derived from 'S'
typedef struct S s;
^
1 error generated.
The error message is correct, but the note is not. The problem here is not
whether S is derived from itself, the problem is just the const mismatch.</pre>
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