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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - No uninitialized warning for self-initialization (e.g., int x = x)"
href="http://llvm.org/bugs/show_bug.cgi?id=18878">18878</a>
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<th>Summary</th>
<td>No uninitialized warning for self-initialization (e.g., int x = x)
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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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>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>chengniansun@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Clang does not warn the self initialization: int x = x;
$: cat s.c
void f(void) {
int x = x;
int array[] = {1, 2};
int y = array[y];
}
$: clang-trunk -Wuninitialized -Winit-self -c s.c
s.c:4:17: warning: variable 'y' is uninitialized when used within its own
initialization [-Wuninitialized]
int y = array[y];
~ ^
1 warning generated.
$: clang-trunk --version
clang version 3.5 (trunk 201498)
Target: x86_64-unknown-linux-gnu
Thread model: posix
$: gcc-trunk -Winit-self -Wuninitialized -c s.c
s.c: In function ‘f’:
s.c:2:7: warning: ‘x’ is used uninitialized in this function [-Wuninitialized]
int x = x;
^
s.c:4:7: warning: ‘y’ is used uninitialized in this function [-Wuninitialized]
int y = array[y];
^</pre>
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