save: Restore the screen if failed to start sudo #2971
Merged
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Similarly to the crash fixed by #2967, which happens if sudo failed, a crash also happens when sudo even fails to start. The reason for the crash is also similar: nil dereference of screen.Screen caused by the fact that we do not restore temporarily disabled screen.
To reproduce this crash, set the
sucmd
option to some non-existing command, e.g.aaa
, and try to save a file with root privileges.