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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 - Broken lambdas with C++ modules"
href="https://bugs.llvm.org/show_bug.cgi?id=51607">51607</a>
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<tr>
<th>Summary</th>
<td>Broken lambdas with C++ modules
</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>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>release blocker
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++2a
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>artyom.lebedev@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
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<p>
<div>
<pre>Consider the following code:
export module main;// <<< Remove this line to make it work correctly
import <iostream>;
export int
main()
{
([](){ std::cout << "callback 1\n"; })();
([](){ std::cout << "callback 2\n"; })();
return 0;
}
It has the following output:
callback 1
callback 1
Expected output (it is correct, when the code compiled without modules):
callback 1
callback 2
I use the following commands for compiling:
CXX="/opt/clang-12/bin/clang++"
CXX_FLAGS="-std=c++20 -stdlib=libc++ -Wall -Werror -g -O0"
CXX_FLAGS="$CXX_FLAGS -fmodules -fimplicit-modules
-fmodules-cache-path=modules-cache"
$CXX -c $CXX_FLAGS test.cpp -o test.o
$CXX $CXX_FLAGS test.o -o test_mod
clang version 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
c1baf946e6cf611ae871e34db5cfea0f94f4b5a0)
Target: x86_64-unknown-linux-gnu
Also tested on: clang version 12.0.0 (<a href="https://github.com/llvm/llvm-project/">https://github.com/llvm/llvm-project/</a>
b978a93635b584db380274d7c8963c73989944a1)
Clang downloaded from GitHub release page.
I also created repository with reproduction code:
<a href="https://github.com/vagran/asio-awaitable-modules-problem-demo/tree/exp-lambdas">https://github.com/vagran/asio-awaitable-modules-problem-demo/tree/exp-lambdas</a></pre>
</div>
</p>
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