Realm is unexpectedly destroyed

[zpzigi754]

The below is the related log from the latest commit (a95bf0f).
Not sure whether it is the cause of the bus error or the result of the bus error.

...
[TRACE]monitor::event -- RMI: RTT_READ_ENTRY       [88160E000, 1FFE00000, 2] > [0, 2, 0, 0, 0]
[TRACE]monitor::event -- RMI: REC_DESTROY          [881BDA000, 80000000, 801BDA000] > [0]
[TRACE]monitor::event -- RMI: GRANULE_UNDELEGATE   [881BDA000] > [0]
[TRACE]monitor::event -- RMI: GRANULE_UNDELEGATE   [881787000] > [0]
...
[TRACE]monitor::event -- RMI: REALM_DESTROY        [88160E000] > [0]
[TRACE]monitor::event -- RMI: GRANULE_UNDELEGATE   [88160E000] > [0]
[TRACE]monitor::event -- RMI: GRANULE_UNDELEGATE   [882C98000] > [0]
...