/in/foo.cc:1:1: error: 'import' does not name a type
    1 | import math
      | ^~~~~~
/in/foo.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
/in/foo.cc:8:5: error: 'temp' does not name a type
    8 |     temp = k
      |     ^~~~