Host out of space error and truncated .vbox files

[DFCA]

If the host runs out of space, one of the VBoxHeadless decides to suspend itself due to that fact, and subsequent attempts to resume attempts to resume or restart the guest without realizing that there was an out of space condition, the .vbox file and its backup .vbox-prev are both truncated. It is useless to make a backup of a truncated file and overwriting a known good file. Adding some code to verify that the file to be backed-up is a fully understandable by the program would avoid this issue.

Along the same lines, are runtime errors reported back via webservices?

Thanks.

[aeichner]

Please reopen if still relevant with a recent VirtualBox release.