vlib/v/checker/tests/fn_call_arg_mismatch_err_c.vv:13:18: error: `os.chdir(files)?` (no value) used as value in argument 1 to `os.ls`
   11 |             println(files)
   12 |         } else {
   13 |             println(os.ls(os.chdir(files)?)?)
      |                           ~~~~~~~~~~~~~~~~
   14 |         }
   15 |         println(files)
