<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/61642>61642</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            Error with C++ modules: not present in definition provided earlier
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          rnikander
      </td>
    </tr>
</table>

<pre>
    Here is a boiled down version of something happening in a real project. 

`Mod1.cc`
```c++
module;
#include <ranges>
export module Mod1;
```

`Mod2.cc`
```c++
module;
#include <iterator>
#include <valarray>
#include <ranges>
export module Mod2;
import Mod1;
```

`build.sh`
```sh

CXX="/Users/rob/Dev/llvm-project/build/bin/clang++ -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.1.sdk -std=c++2b"
set -e
$CXX -fprebuilt-module-path=. -x c++-module Mod1.cc --precompile -o Mod1.pcm
$CXX -fprebuilt-module-path=. -x c++-module Mod2.cc --precompile -o Mod2.pcm
```

Errors:
```
In module 'Mod1' imported from Mod2.cc:6:
/llvm-project/build/bin/../include/c++/v1/__ranges/zip_view.h:494:40: error: 'std::__1::ranges::views::__zip::__fn::operator()' from module 'Mod1.<global>' is not present in definition of 'std::__1::ranges::views::__zip::__fn' provided earlier
 _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Ranges&&... __rs) const
 ^
/llvm-project/build/bin/../include/c++/v1/__ranges/zip_view.h:491:40: note: declaration of 'operator()' does not match
  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()() const noexcept { return empty_view<tuple<>>{}; }
 ^
/llvm-project/build/bin/../include/c++/v1/__ranges/zip_view.h:494:40: note: declaration of 'operator()' does not match
  _LIBCPP_HIDE_FROM_ABI constexpr auto operator()(_Ranges&&... __rs) const
 ^
1 error generated.
```
</pre>
<img width="1px" height="1px" alt="" src="http://email.email.llvm.org/o/eJzEVt1u2zgTfRr6ZiBBJmXJvvCFfyI0-L6iRYsFfCdQ4sjmliIJknaSPv2CkpykSYPubrC7gCCO-TOcOefMWNx7edSIa7LYksV-xs_hZNzaafmNa4Fu1hjxsP6ADkF64NAYqVCAMHcaLui8NBpMB970GE5SH-HErUUdLamBg0OuwDrzO7YhBZLtSbaZ3kX20Yh52rakyB6nxqcldBufYbY34qyQsOknoUzqVp0FAmE7x_URPWE34yLeW-MCjEcg-n86d3X-Ogj6ziBkQMeDcY9h_Lh84Yo7xx_eWP5VCvTxVtkPS38qreYslUj96XVe_vR86-5wIGxPKCW0-s2j84RWzjSEVnu8EFopdemTiUBCq8FtHKUmtGoV18cRJkikf_DOmACEVhtrlWx5kEZHh4fWCEy5tYRWO6MD6uDHG1AZi47Q6rPioTOuj_Mfefvp6yG109SLnV_3_3vaNGfpPPXiGyQ-CML2E2m0iRkNCXoMkOAV-Hx3OEDSWYcxk5CMMCeWhxNh-xSSe5hcJM9ElLYtJIl12JreSoWQmHHetv27PNM3PNNnnn9G8I1zxnnCNj_dc6uv8iG0HNRCSxjFgwI6Z_rr3YRtiicvv2A7TQmtJuFG8qf6oNVlTmhV15OQafVd2voi8S49EbbJV3l8Z4RtAGPY0SC0HPjaELap6_loXAsh2vG4v65_l_Zqdnq0ohaGkqNLQlcxvyGtH9NOCdsdlWm4itUVMfCgTQDr0KMOsUMJ7KSWYWpj7wmLlrHPXaRAAcidkuhGWKH-_-129_lz_eF2f1NXXz59rDfbW2iN9gHvrQN-DgZeJrSsv0xwFoQWaZpCXcfiXI0HJ9dkcfPPcjd_5E6bgHEU2Cru-DPIXnMhDI5I9zy0U7uBv4nDY8qgDd63aAOQcgsOw9lpwN6GhyFgwnbhbGOP3kW22Q0pt6TcE7aFOPxLeOX_OV5_TTfzsSbhiDr6QZG-6CgzsWZixVZ8hut5Ua4W-SIvytlpnXWiW64YW-CyKdpiwbOmFY1o8mbZdW1WzuSaZpRljLIspzktU75YrhZdmYlFV-Q5XZI8w55LlUYmUuOOM-n9GdfFvMjpTPEGlb9-l7j1QFdzPnqSZ0r64J-OBRkUroeeCHcynGA3_SeN7cBPdLxR9y-rdnZ2an0KwQ6FTitCq6MMp3OTtqafdPNaPkPoURBD9H8EAAD__9fjz8E">