Crash with the new compactor on 64-bit linux

IIRC it mostly happened when I tried to save code with Monticello by pressing the Save or the Changes button, but most of the time that just works.

Hi All,

I've been seeing random crashes with the VM having the new compactor. It takes anywhere between 5 mintues to a few hours for the crash to happen.
The crash dumps didn't seem to contain relevant information and sometimes had no C call stack at all.
So I decided to run the VM with gdb to catch the bug, and got the following:

Program received signal SIGSEGV, Segmentation fault.
lookupOrdinaryNoMNUEtcInClass (class=0) at /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:68119
68119   /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c: No such file or directory.
(gdb) bt
#0  lookupOrdinaryNoMNUEtcInClass (class=0) at /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:68119
#1  0x000000000043fd97 in lookupOrdinaryreceiver (selector=21887312, rcvr=<optimized out>) at /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:19195
#2  0x000000000048f128 in ceSICMiss (receiver=14637768) at /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/cogitX64.c:3232
#3  0x0000000000900461 in ?? ()
#4  0x00007ffffff98c51 in ?? ()
#5  0x000000000045af68 in interpret () at /home/travis/build/OpenSmalltalk/opensmalltalk-vm/spur64src/vm/gcc3x-cointerp.c:2650
#6  0x0000000000901010 in ?? ()
#7  0x0000000000df5ac8 in ?? ()
#8  0x0000000000df5780 in ?? ()
#9  0x0000000000df6da8 in ?? ()
#10 0x0000000000df6fe8 in ?? ()
#11 0x0000000000000000 in ?? ()
(gdb) info registers
rax            0x0      0
rbx            0x2e78e0 3045600
rcx            0x0      0
rdx            0x12e78e0        19822816
rsi            0x2e78e0 3045600
rdi            0x0      0
rbp            0x14df950        0x14df950
rsp            0x7ffffff98b60   0x7ffffff98b60
r8             0xffffffffffffffff       -1
r9             0x2      2
r10            0x7ffffffaac00   140737488006144
r11            0xa087df 10520543
r12            0x14df950        21887312
r13            0xa087ef 10520559
r14            0x15903f0        22610928
r15            0x12e78e0        19822816
rip            0x43f9b6 0x43f9b6 <lookupOrdinaryNoMNUEtcInClass+38>
eflags         0x10283  [ CF SF IF RF ]
cs             0x33     51
ss             0x2b     43
ds             0x0      0
es             0x0      0
fs             0x0      0
gs             0x0      0

I obviously didn't have any source files at those paths, but the line numbers may still be of help.
The VM was cog_linux64x64_squeak.cog.spur_201702211732 from Travis with the plugins copied over from some previous version, because, as I mentioned it in another mail, newer builds come with no plugins at all.