[Bug c++/114275] New: using std::thread within a templated function in a module fails to compile

[michael.kenzel at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114275

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

results in

        ‘
        /usr/include/c++/13/tuple:491: confused by earlier errors, bailing out