Failed assertion in Mm on amd64 port

Assertion C:\rosgit\ntoskrnl\mm\ARM3\procsup.c(1391): (Pfn1->u3.e2.ReferenceCount == 0) || (Pfn1->u3.e1.WriteInProgress)

nt!MmDeleteProcessAddressSpace2+0x2a5: k

 # Child-SP          RetAddr           Call Site

00 fffff880`04e24a20 fffff800`0052719e nt!MmDeleteProcessAddressSpace2+0x2a5 [C:\rosgit\ntoskrnl\mm\ARM3\procsup.c @ 1391]

01 fffff880`04e24a90 fffff800`00555bca nt!MmDeleteProcessAddressSpace+0x4e [C:\rosgit\ntoskrnl\mm\marea.c @ 619]

02 fffff880`04e24ac0 fffff800`00543125 nt!PspDeleteProcess+0x22a [C:\rosgit\ntoskrnl\ps\kill.c @ 358]

03 fffff880`04e24b50 fffff800`00548037 nt!ObpDeleteObject+0x235 [C:\rosgit\ntoskrnl\ob\oblife.c @ 212]

04 fffff880`04e24bf0 fffff800`0053d7ac nt!ObfDereferenceObject+0x187 [C:\rosgit\ntoskrnl\ob\obref.c @ 346]

05 fffff880`04e24c40 fffff800`0053d204 nt!ObpCloseHandleTableEntry+0x1dc [C:\rosgit\ntoskrnl\ob\obhandle.c @ 775]

06 fffff880`04e24cc0 fffff800`0053a7e0 nt!ObpCloseHandle+0x224 [C:\rosgit\ntoskrnl\ob\obhandle.c @ 1772]

07 fffff880`04e24dc0 fffff800`0040528d nt!NtClose+0x30 [C:\rosgit\ntoskrnl\ob\obhandle.c @ 3403]

08 fffff880`04e24df0 00000001`40012def nt!KiSystemCall64Again+0x26

09 00000000`0021ece0 00000001`40013766 smss!SmpExecuteImage+0x47f [C:\rosgit\base\system\smss\smss.c @ 143]

0a 00000000`0021ee20 00000001`4001266c smss!SmpInvokeAutoChk+0x166 [C:\rosgit\base\system\smss\smss.c @ 212]

0b 00000000`0021f840 00000001`4000aac7 smss!SmpExecuteCommand+0x18c [C:\rosgit\base\system\smss\smss.c @ 250]

0c 00000000`0021f930 00000001`40008f50 smss!SmpLoadDataFromRegistry+0x7d7 [C:\rosgit\base\system\smss\sminit.c @ 2357]

0d 00000000`0021fa90 00000001`40013b5d smss!SmpInit+0x580 [C:\rosgit\base\system\smss\sminit.c @ 2530]

0e 00000000`0021fc30 00000001`40014c27 smss!_main+0x16d [C:\rosgit\base\system\smss\smss.c @ 486]

0f 00000000`0021fe60 00000000`00000000 smss!NtProcessStartup+0x837 [C:\rosgit\sdk\lib\nt\entry_point.c @ 195]