Virtual box crashes on Windows host.

[victorlk2]

VBox version 6.1.14r140239 (QT 5.6.2)
Virtual box machine crashes with error:
VBoxSharedClipboardClass-32056: VirtualBoxVM.exe - Application Error
The instruction at 0x00007FFF04362B32 referenced memory at 0x0000000000000001. The memory could not be written. Click on OK to terminate the program

Please fix it, it's not possible to leave virtual machine on several days without crashing.

[scottgus1]

The log shows the guest starting from a save-state, not full shutdown, then running for 67 hours 44ish minutes, with a reset from a source unrecognizable to me at 52:44 hours. Looks pretty stable so far. Save-states can have glitches, but usually pretty soon after startup. FWIW full shutdowns offer more reliable operation.

Your host PC has 4 hyperthreaded cores and you have 8 processors in the guest. Reduce guest processor count to 2 and see if stability results.

You have 3D acceleration on, and Guest Additions 6.1.2 inside Virtualbox 6.1.14. With 3D on, GAs should match the Virtualbox version.

The actual Virtualbox crash happened in the shared clipboard system. Do you recall if you were passing something using the clipboard at the time of the crash and what that something was?

[victorlk2]

The log shows the guest starting from a save-state, not full shutdown, then running for 67 hours 44ish minutes, with a reset from a source unrecognizable to me at 52:44 hours. Looks pretty stable so far. Save-states can have glitches, but usually pretty soon after startup. FWIW full shutdowns offer more reliable operation.

Previously I didn't have such errors in these cases. Save-states worked without glitches.

Your host PC has 4 hyperthreaded cores and you have 8 processors in the guest. Reduce guest processor count to 2 and see if stability results.

Thank you, I'll try this variant.

You have 3D acceleration on, and Guest Additions 6.1.2 inside Virtualbox 6.1.14. With 3D on, GAs should match the Virtualbox version.

This is bad idea I think. You should disable this feature automatically after VM start to avoid GA versions conflicts. Previously I've used different combinations of GA-VB 6.*.* versions without problems. I'll turn off this feature manually.

The actual Virtualbox crash happened in the shared clipboard system. Do you recall if you were passing something using the clipboard at the time of the crash and what that something was?

No, a clipboard was empty during crash.