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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Segfault when assigning map of default-ctr'ed (int, function)"
href="https://llvm.org/bugs/show_bug.cgi?id=28469">28469</a>
</td>
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<th>Summary</th>
<td>Segfault when assigning map of default-ctr'ed (int, function)
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</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>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bbannier@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Assigning a non-empty map of (int, function) segfaults for me with
optimizations.
Reproducer:
#include <functional>
#include <map>
struct F {
std::map<int, std::function<void()>> m;
F() { m[42] = []() {}; }
};
int main() {
F f;
f = F{};
}
Gives:
% clang++ -O2 --std=c++11 f.cpp && ./a.out
[1] 12965 segmentation fault ./a.out`
I would have expected this program to run to termination successfully.
I am using clang and libcxx tracking HEAD pretty closely,
% clang++ --version
clang version 3.9.0 (<a href="http://llvm.org/git/clang">http://llvm.org/git/clang</a>
8dd4631f9110e39089b89284ce3ddc476f75820e) (<a href="http://llvm.org/git/llvm">http://llvm.org/git/llvm</a>
baa0bfe5d8f558f0785bd9e07d29d660461e291f)
Target: x86_64-apple-darwin14.5.0
Thread model: posix
My HEAD of libcxx is
git-svn-id: <a href="https://llvm.org/svn/llvm-project/libcxx/trunk@273840">https://llvm.org/svn/llvm-project/libcxx/trunk@273840</a>
91177308-0d34-0410-b5e6-96231b3b80d8
This program appears to terminate successfully with the following builds from
homebrew,
% clang++-3.4 --version
clang version 3.4.2 (tags/RELEASE_34/dot2-final)
Target: x86_64-apple-darwin16.0.0
Thread model: posix
% clang++-3.6 --version
clang version 3.6.2 (tags/RELEASE_362/final)
Target: x86_64-apple-darwin16.0.0
Thread model: posix</pre>
</div>
</p>
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