/in/foo.c:1:1: warning: data definition has no type or storage class
    1 | a = 123
      | ^
/in/foo.c:1:1: warning: type defaults to 'int' in declaration of 'a' [-Wimplicit-int]
/in/foo.c:2:1: error: expected ',' or ';' before 'b'
    2 | b = 500
      | ^