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From: "michael.kenzel at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114275] New: using std::thread within a templated function
 in a module fails to compile
Date: Fri, 08 Mar 2024 02:04:29 +0000
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X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.2.0
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X-Bugzilla-Severity: normal
X-Bugzilla-Who: michael.kenzel at gmail dot com
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114275

            Bug ID: 114275
           Summary: using std::thread within a templated function in a
                    module fails to compile
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: michael.kenzel at gmail dot com
  Target Milestone: ---

The following example will reproduce the issue:

        // A.ixx
        module;

        #include <thread>

        export module A;

        export void fun(auto&&)
        {
                std::thread([]{}).join();
        }

        // main.cpp
        import A;

        int main()
        {
                fun(42);
        }

build with

        g++ -std=3Dc++23 -fmodules-ts -c -x c++ A.ixx
        g++ -std=3Dc++23 -fmodules-ts main.cpp A.o

results in

        =E2=80=98
        /usr/include/c++/13/tuple:491: confused by earlier errors, bailing =
out=