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<head>
<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - LLDB thinks a vector has many more elements than it does"
href="http://llvm.org/bugs/show_bug.cgi?id=17805">17805</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>LLDB thinks a vector has many more elements than it does
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dunpealer@gmail.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11483" name="attach_11483" title="Test case demonstrating the bug">attachment 11483</a> <a href="attachment.cgi?id=11483&action=edit" title="Test case demonstrating the bug">[details]</a></span>
Test case demonstrating the bug
This is on Linux, Xubuntu 13.04, using latest APT packages from llvm.org/apt.
Compiler: Ubuntu clang version 3.4-1~exp1 (trunk) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
lldb version 3.4 ( revision )
libstdc++ version: 4.7.3-1ubuntu1
When running the attached test.cc code, breaking at line #14 and executing `p
vec` in the debugger, the following output is printed:
(lldb) p vec
(std::vector<std::vector<std::pair<int, int>, std::allocator<std::pair<int,
int> > >, std::allocator<std::vector<std::pair<int, int>,
std::allocator<std::pair<int, int> > > > >) $0 = size=4294967295 {
[0] = size=4294967295 {
[0] = (first = 0, second = 1)
[1] = (first = 1, second = 2)
[2] = (first = 2, second = 3)
[3] = (first = 3, second = 4)
...
}
[1] = size=4294967295 {
[0] = (first = 1, second = 2)
[1] = (first = 2, second = 3)
[2] = (first = 3, second = 4)
[3] = (first = 4, second = 5)
...
}
LLDB thinks vec itself is of size 4294967295 when in fact it contains only 300
vectors. Worse, it thinks each of these 300 vectors contains 4294967295
pair<int,int>s, when in fact there are only 4.</pre>
</div>
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