There are 2 different diffs reported by users for this test.
Count
Diff
9 (82%)
001+ Fatal error: Uncaught Error: Undefined class constant '__BIGGEST_ALIGNMENT__' in %s/022.php:57
001- ok
002+ Stack trace:
003+ #0 {main}
004+ thrown in %s/022.php on line 57
2 (18%)
001+ FAIL: sizeof(struct {char a; uint32_t b __attribute__((aligned));}) != 32
002+ FAIL: alignof(struct {char a; uint32_t b __attribute__((aligned));}) != 16