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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 --- - clang -Warray-bounds doesn't warn in some instances (where XLC and gcc do)"
href="http://llvm.org/bugs/show_bug.cgi?id=17383">17383</a>
</td>
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<tr>
<th>Summary</th>
<td>clang -Warray-bounds doesn't warn in some instances (where XLC and gcc do)
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>sean@rogue-research.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11283" name="attach_11283" title="repro case">attachment 11283</a> <a href="attachment.cgi?id=11283&action=edit" title="repro case">[details]</a></span>
repro case
Test case attached:
----------------
#include <iostream>
class MyClass
{
private:
int ivar[2];
public:
void Method()
{
// This warns.
this->ivar[2] = 0;
// This warns.
int foo[2];
foo[2] = 0;
// This warns.
int tmp = this->ivar[2]; (void)tmp;
// FAILS TO WARN
std::cout << this->ivar[2];
}
};
----------------
clang trunk r191092 fails to warn on the last case, where the "<<" is involved.
This is a reduced test case from VTK, which is built daily by many compilers.
XLC warns:
"/.../VTK/Rendering/Core/vtkTextMapper.cxx", line 101.53: 1540-2907 (W) The
subscript 2 is out of range. The valid range is 0 to 1.
<<a href="http://open.cdash.org/viewBuildError.php?type=1&buildid=3040120">http://open.cdash.org/viewBuildError.php?type=1&buildid=3040120</a>>
and gcc warns:
/home/kitware/Dashboards/MyTests/VTK-nightly-release-src/Rendering/Core/vtkTextMapper.cxx:
In member function 'virtual void vtkTextMapper::PrintSelf(std::ostream&,
vtkIndent)':
/home/kitware/Dashboards/MyTests/VTK-nightly-release-src/Rendering/Core/vtkTextMapper.cxx:101:54:
warning: array subscript is above array bounds [-Warray-bounds]
<<a href="http://open.cdash.org/viewBuildError.php?type=1&buildid=3040230">http://open.cdash.org/viewBuildError.php?type=1&buildid=3040230</a>></pre>
</div>
</p>
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