After deleting snapshot VM is inaccessible and behaves strange until restart

[Jacky Ryan]

I didn't found any similar bug and hope that it'll be fixed with the next version. This bug is very simple to reproduce:

I've got a VM with WinXP and one snapshot on my Host (Win7-64) and Vbox 4.1.16. After this VM run and snapshot changed I create a second snapshot, e.g.

-+--Snapshot A

| +--+--Snapshot B

| +----Current State

No I want to merge Snapshot A to the root vdi-file and delete Snapshot A. But it's strange that Current state says "changed" (doesn't change after restarting Virtualbox Manager):

-+--Snapshot B

| +----Current State (changed)

Then I press "restore Snapshot B" to return to Snapshot B. Now it takes a while and then it states "The selected virtual machine is inaccessible. Please inspect the error message shown below and press the Refresh button..." but there is no error message and refreshing doesnt change anything. After restarting Virtualbox Manager it takes few seconds and still shows the same but without "inaccessible" error:

-+--Snapshot B

| +----Current State (changed)

Now if I restore to Snapshot B it succeeds that "(changed)" disappears and it seems that it repaired itself. If I look into "Virtual Media Manager" to the VM I see 2 snapshots, one attached and the other one not attached. After deleting the "not attached" everything works again.

Could you please fix that bug?

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.