Updating from trunk gets stuck forever at "Initializing ReleaseBuilder-cmm.51

I got a couple of trunk images about 3 weeks old. When I update both images get stuck at "Initializing ReleaseBuilder-cmm.51". No use doing Alt+.
Progress bar stuck at 0%
Processor usage (single core) > 90% almost all all the time.

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND           
27935 casimiro  20   0 1037m 143m 2884 R 96.4  7.3   7:00.37 squeakvm          
 1736 root      20   0  113m  40m  18m S  5.7  2.1   6:00.59 X                 
 2402 casimiro   9 -11  160m 5056 3976 S  3.8  0.3   3:38.41 pulseaudio