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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Destructor not generated for std::function<void()>"
href="https://bugs.llvm.org/show_bug.cgi?id=33778">33778</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Destructor not generated for std::function<void()>
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>alex@xnor.ai
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18787" name="attach_18787" title="reduced test case">attachment 18787</a> <a href="attachment.cgi?id=18787&action=edit" title="reduced test case">[details]</a></span>
reduced test case
When compiling the attached case.cc with Clang,
std::function<void()>::~function() is not generated, causing a link failure:
% clang++ -std=c++11 case.cc
/tmp/case-042075.o: In function `foo(std::function<void ()> const&)':
case.cc:(.text+0x79): undefined reference to `std::function<void
()>::~function()'
clang-4.0: error: linker command failed with exit code 1 (use -v to see
invocation)
GCC does generate ~function() in this case, however:
% g++ -std=c++11 case.cc
% # OK
The problem seems to occur under both libstdc++ and libc++. I have also
attached a reduced version of the preprocessed code (using libstdc++),
case-pp.cc, demonstrating the same problem. (case-pp.cc will have additional
link errors for function::function(function const&) which are expected)
I have tested this on:
- clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final), target:
x86_64-pc-linux-gnu
- Apple LLVM version 8.1.0 (clang-802.0.42), target: x86_64-apple-darwin16.6.0
- clang version 4.0.1 (tags/RELEASE_401/final), target:
x86_64-unknown-linux-gnu</pre>
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</p>
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