/in/foo.cc:28:5: error: redefinition of 'int main()'
   28 | int main()
      |     ^~~~
/in/foo.cc:3:5: note: 'int main()' previously defined here
    3 | int main()
      |     ^~~~
/in/foo.cc:53:5: error: redefinition of 'int main()'
   53 | int main()
      |     ^~~~
/in/foo.cc:3:5: note: 'int main()' previously defined here
    3 | int main()
      |     ^~~~