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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - No warning for function call through a non-compatible type"
href="http://llvm.org/bugs/show_bug.cgi?id=18875">18875</a>
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<th>Summary</th>
<td>No warning for function call through a non-compatible type
</td>
</tr>
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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>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chengniansun@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Clang does not warn a function call through a non-compatible type. Such a
function call can lead to unexpected behavior, such as the following code.
$: cat s.c
int foo(double *x) {return (int)*x;}
typedef int (*F)(int*);
int main() {
int x = 0;
return ((F)foo)(&x);
}
$: clang-trunk -Weverything -Wno-missing-prototypes s.c
$: gcc-trunk s.c
s.c: In function ‘main’:
s.c:5:10: warning: function called through a non-compatible type
return ((F)foo)(&x);
^
$
$: clang-trunk --version
clang version 3.5 (trunk 201498)
Target: x86_64-unknown-linux-gnu
Thread model: posix</pre>
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</p>
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