Jinoh Kang (@iamahuman) commented about dlls/ntdll/tests/exception.c:
/* invoke NtContinue... */
0xff, 0x94, 0x24, 0xd0, 0x00, 0x00, 0x00, /* call *8*12+0x70(%rsp) */
/* validate stack pointer */
0x48, 0x8b, 0x0c, 0x24, /* 1: (%rsp), %rcx */
0x48, 0x39, 0xe1, /* cmp %rsp, %rcx */
0x74, 0x02, /* je 2; jump over ud2 */
0x0f, 0x0b, /* ud2; stack pointer invalid, let's crash */
/* invoke capture context */
0x48, 0x8b, 0x4c, 0x24, 0x50, /* 2: mov 8*10(%rsp), %rcx; context */
0x48, 0x81, 0xc1, 0xd0, 0x04, 0x00, 0x00, /* $0x4d0, %rcx; +sizeof(CONTEXT) to get context->after */
0xff, 0x54, 0x24, 0x68, /* call *8*13(%rsp) */
/* free stack */
0x48, 0x83, 0xc4, 0x08, /* $0x8, %rsp */
```suggestion:-0+0 0x48, 0x83, 0xc4, 0x08, /* add $0x8, %rsp */ ```