Crash at machine save time. (Log attached)

[ci-zephyurus]

When I tried to save the virtual machine status in order to shutdown the host OS, VBox crashed saying an address very much near 0x000...000 could not be writen into. (I think it was 0xCB or something. Sorry I failed to capture the screen dump. Well, looking at the log, I think the address could be the value in ExceptionInformation[1]=00000000000000c8 )

I am attaching the VBox.log.2 file. The beginning of error stack dump is as follows:

135:21:02.909608 
135:21:02.909610 !!! rtR3WinUnhandledXcptFilter caught an exception on thread 0000000000003d30 in 10396 !!!
135:21:02.909629 
135:21:02.909629 ExceptionCode=0xc0000005 ExceptionFlags=0x00000000 ExceptionAddress=00007ffc1524eca0
135:21:02.909635 ExceptionInformation[0]=0000000000000001
135:21:02.909640 ExceptionInformation[1]=00000000000000c8
135:21:02.909645 
135:21:02.909645 cs:rip=0033:00007ffc1524eca0
135:21:02.909650 ss:rsp=002b:000000c83a6ff558 rbp=0000000000000000
135:21:02.909655 rax=00007ffc1524eca0 rcx=000002770ecc21e0 rdx=0000000000000000 rbx=000002770d2ea5c0
135:21:02.909661 rsi=0000000000000000 rdi=0000000000000000 rsp=000000c83a6ff558 rbp=0000000000000000
135:21:02.909666 r8 =0000000000000000 r9 =0000000000000001 r10=00000fff82a49d94 r11=0000000000101000
135:21:02.909671 r12=000002770ec4fd20 r13=0000000000000000 r14=000002770eb7d490 r15=000002771dde0180
135:21:02.909676 ds=002b es=002b fs=0053 gs=002b eflags=00010247
135:21:02.909681 p1home=0000000000000000 p2home=8000000000000007 pe3home=000002770d2ea5c0
135:21:02.909686 p4home=0000000000000000 p5home=0000000000000000 pe6home=0000000000000000
135:21:02.909691    LastBranchToRip=0000000000000000    LastBranchFromRip=0000000000000000
135:21:02.909695 LastExceptionToRip=0000000000000000 LastExceptionFromRip=0000000000000000

[galitsyn]

Duplicate of #21711.