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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Accepts invalid function with external linkage and type with no linkage"
href="http://llvm.org/bugs/show_bug.cgi?id=15463">15463</a>
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<th>Summary</th>
<td>Accepts invalid function with external linkage and type with no linkage
</td>
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<th>Product</th>
<td>clang
</td>
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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>
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<th>Status</th>
<td>NEW
</td>
</tr>
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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>rafael.espindola@gmail.com
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>The c++ standard says:
A type without linkage shall not be used as the type of a variable or function
with external linkage unless
— the entity has C language linkage (7.5), or
— the entity is declared within an unnamed namespace (7.3.1), or
— the entity is not odr-used (3.2) or is defined in the same translation unit.
but we accept
typedef struct {
void *foo() { return 0; }
} *A;
void test(A a);
void zed() {
test(0);
}</pre>
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