Hello! I can quite easily crash the VM when updating pharo 1.4 image (Right click -> System -> Software Update). It crashes almost always. VM is Cog r2522. (gdb) bt #0 markAndTrace (oop=-7168) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:20994 #1 0x080602c2 in markAndTraceStackPage (thePage=0xffffaa8c) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:20887 #2 0x0806036d in markAndTraceStackPages (fullGCFlag=<value optimized out>) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:20777 #3 markAndTraceInterpreterOops (fullGCFlag=<value optimized out>) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:20648 #4 0x080746b1 in markPhase (fullGCFlag=-2139637670) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:21333 #5 0x08074d3e in incrementalGC () at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:17530 #6 0x080751ff in sufficientSpaceAfterGC (minFree=-2139637670) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:43517 #7 0x08078081 in checkForEventsMayContextSwitch (mayContextSwitch=1) at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:11257 #8 0x0807a6e0 in ceCheckForInterrupts () at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:10012 #9 0xb79886eb in ?? () #10 0x08082164 in initStackPagesAndInterpret () at /home/eliot/oscogvm/src/vm/gcc3x-cointerp.c:18088 #11 0x0805c49a in main (argc=Cannot access memory at address 0x8077b85a ) at /home/eliot/oscogvm/platforms/unix/vm/sqUnixMain.c:1769 -- Milan Mimica http://sparklet.sf.net