variable symbol 'struct X x' changed
  type 'struct X' changed
    member changed from 'int a' to 'int a:32'
      was not a bit-field, is now a bit-field
    member changed from 'int b:32' to 'int b'
      was a bit-field, is now not a bit-field
    member changed from 'int c' to 'int c:16'
      was not a bit-field, is now a bit-field
    member changed from 'int d:16' to 'int d'
      was a bit-field, is now not a bit-field

exit code 4