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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Spurious warnings from std::u16string, std::u32string"
href="http://llvm.org/bugs/show_bug.cgi?id=17866">17866</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Spurious warnings from std::u16string, std::u32string
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>j4cbo@dropbox.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>operator+= on std::u16string gives me the following warning buried deep in
std::u16string: "Argument to operator delete is the address of a local stack
variable, which is not memory allocated by 'new'"
Here's a simple test case, and the result of running it with the checker-275
bundle:
$ cat test.cpp
#include <string>
void test() {
std::u16string s;
s += 'a';
}
$ ~/src/checker-275/scan-build clang++ -c test.cpp -std=c++11 -stdlib=libc++ \
'-I/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/usr/include'
-o test
scan-build: Using '/Users/j4cbo/src/checker-275/bin/clang' for static analysis
In file included from test.cpp:1:
In file included from
/Users/j4cbo/src/checker-275/bin/../lib/c++/v1/string:434:
In file included from
/Users/j4cbo/src/checker-275/bin/../lib/c++/v1/algorithm:594:
/Users/j4cbo/src/checker-275/bin/../lib/c++/v1/memory:1676:10: warning:
Argument to operator delete is the address of a local stack variable, which is
not memory allocated by 'new'
{::operator delete((void*)__p);}
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
scan-build: Removing directory
'/var/folders/gp/2n2s5sbn54vgg6vs4rsmqpynyr_mb4/T/scan-build-2013-11-09-12'
because it contains no reports.
scan-build: No bugs found.
(The built-in checker in XCode 5 gives the same warning, with much better
output about the intermediate call path, but that's a lot harder to paste into
a bug report...)
std::u32string causes the same error, but std::string does not.</pre>
</div>
</p>
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