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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - A void* handler doesn't catch nullptr_t, violating 15.3p3.4"
href="https://llvm.org/bugs/show_bug.cgi?id=25022">25022</a>
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<th>Summary</th>
<td>A void* handler doesn't catch nullptr_t, violating 15.3p3.4
</td>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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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>
</tr>
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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>C++11
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>andrey.vul@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Given the testcase:
// begin throw-nullptr.cc
extern "C" int puts(const char *);
int main() {
try {
throw nullptr;
} catch (void *) {
puts("catch void*");
} catch (...) {
puts("catch ...");
}
}
// end throw-nullptr.cc
and invocation
clang++ -std=c++11 throw-nullptr.cc && ./a.out
the output "catch void*" is expected due to 15.3p3.4 (aka [except.handle]/3.4)
"A handler is a match for an exception object of type E if ... the handler is
of type cv T or const T& where T is a pointer or pointer to member type and E
is
std::nullptr_t."
But catch(...) is used instead, as if the nullptr_t -> pointer conversion was
omitted during computation of which catch-block to use.</pre>
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