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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang failed to discard const quilifier"
href="https://llvm.org/bugs/show_bug.cgi?id=24564">24564</a>
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<th>Summary</th>
<td>Clang failed to discard const quilifier
</td>
</tr>
<tr>
<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>All
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<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>rajendra.sy@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Sample 'c' code:
#include <stdio.h>
int main()
{
const int k = 5;
int *kptr = &k;
*kptr = 7;
printf("%d\n", k);
return 0;
}
The output of program is '5' not '7'.
The clang shows a warning
test.c:6:9: warning: initializing 'int *' with an expression of type 'const int
*' discards qualifiers
[-Wincompatible-pointer-types-discards-qualifiers]
int *kptr = &k;
As per the warning clang has to ignore the 'const' qualifier & update the value
to 7. But it does not update it.
I tried this with latest GCC it does throw a similar warning & update the value
to 7.</pre>
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