function symbol 'int fun(struct N, struct N*)' changed
  type 'int(struct N, struct N*)' changed
    parameter 1 type 'struct N' changed
    parameter 2 type 'struct N*' changed
      pointed-to type 'struct N' changed

type 'struct N' changed
  member 'struct N* next' changed
    type 'struct N*' changed
      pointed-to type 'struct N' changed
  member changed from 'char extra' to 'short extra'
    type changed from 'char' to 'short'

exit code 4