It crashed while making probes

[Paul E. Johnson]

OK, this is a low priority issue, not a big deal.  I just got to
fiddling with probes...

I've got the grid of objects that is receiving the message from the
rightclick on the raster. In each of these objects, there is a list of
agents, and I take the first one of those agents and create a probe for
it. Then when I right click on the class name in the probe, I get a
crash and here is the backtrace.

Program received signal SIGSEGV, Segmentation fault.
0x4021da22 in objc_msg_lookup ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/libobjc/sendmsg.c:609
/home/alex/redhat/BUILD/swarm-2.0.1/libobjc/sendmsg.c:609: No such file
or directory.
Current language:  auto; currently c
(gdb) bt
#0  0x4021da22 in objc_msg_lookup ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/libobjc/sendmsg.c:609
#1  0x40153b38 in __DTOR_END__ ()
#2  0x4014861b in -[VarProbe probeAsString:Buffer:withFullPrecision:]
(self=0x82c5610,
    _cmd=0x401534d8, anObject=0x819bb68, buf=0xbfffd2f0 "\202l\021@",
precision=0)
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/objectbase/VarProbe.m:582
#3  0x40148067 in -[VarProbe probeAsString:Buffer:] (self=0x82c5610,
_cmd=0x4005dce0,
    anObject=0x819bb68, buf=0xbfffd2f0 "\202l\021@")
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/objectbase/VarProbe.m:504
#4  0x40052f07 in -[VarProbeWidget update] (self=0x82e0de8,
_cmd=0x4005dc98)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/VarProbeWidget.m:117
#5  0x40052ca6 in -[VarProbeWidget createEnd] (self=0x82e0de8,
_cmd=0x40059d20)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/VarProbeWidget.m:74
#6  0x4004a9e5 in -[ClassDisplayWidget createEnd] (self=0x82b0ba8,
_cmd=0x4005a2d8)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/ClassDisplayWidget.m:161
#7  0x4004bd16 in -[CompleteProbeDisplay createEnd] (self=0x81b6590,
_cmd=0x4005ccd8)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/CompleteProbeDisplay.m:87
#8  0x400507a4 in -[ProbeDisplay createEnd] (self=0x81c65c8,
_cmd=0x4005d130)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/ProbeDisplay.m:102
#9  0x40051589 in -[ProbeDisplayManager createCompleteProbeDisplayFor:]
(self=0x8109f90,
    _cmd=0x4005ddc0, anObject=0x819bb68)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/ProbeDisplayManager.m:196
#10 0x40028907 in L10 ()
#11 0x401b2c93 in objc_call ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/defobj/_fcall.m:154
---Type <return> to continue, or q <return> to quit---
#12 0x401a8e02 in -[FCall(c) _performCall] (self=0x81c6ef8,
_cmd=0x40136908)
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/defobj/FCall.m:457
#13 0x40130e3f in tclObjc_msgSendToClientData ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/tclobjc/tclObjc.m:159
#14 0x401313b0 in tclObjc_msgSendToArgv1 ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/tclobjc/tclObjc.m:159
#15 0x40351707 in TclInvokeStringCommand ()
#16 0x4036c888 in TclExecuteByteCode ()
#17 0x40352043 in Tcl_EvalObj ()
#18 0x4038b5f6 in Tcl_UplevelObjCmd ()
#19 0x4036c888 in TclExecuteByteCode ()
#20 0x40352043 in Tcl_EvalObj ()
#21 0x4038bb98 in TclObjInterpProc ()
#22 0x4036c888 in TclExecuteByteCode ()
#23 0x40352043 in Tcl_EvalObj ()
#24 0x40351e22 in Tcl_Eval ()
#25 0x40353580 in Tcl_GlobalEval ()
#26 0x402b9343 in Tk_BindEvent ()
#27 0x402bd8d4 in TkBindEventProc ()
#28 0x402c12be in Tk_HandleEvent ()
#29 0x402c1659 in WindowEventProc ()
#30 0x40385467 in Tcl_ServiceEvent ()
#31 0x40385699 in Tcl_DoOneEvent ()
#32 0x40105538 in tkobjc_doOneEventSync ()
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/tkobjc/common.m:111
---Type <return> to continue, or q <return> to quit---
#33 0x4004c63a in -[ControlPanel setStateStopped] (self=0x810ca60,
_cmd=0x4005a5c8)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/ControlPanel.m:131
#34 0x4004c512 in -[ControlPanel startInActivity:] (self=0x810ca60,
_cmd=0x4005adb8,
    activityID=0x81ab370)
    at
/home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/ControlPanel.m:98
#35 0x4004d06f in -[GUISwarm go] (self=0x810f218, _cmd=0x805a860)
    at /home/alex/redhat/BUILD/swarm-2.0.1/src/simtoolsgui/GUISwarm.m:49
#36 0x804f224 in main (argc=1, argv=0xbffff9b4) at main.m:38
#37 0x4058dcb3 in __libc_start_main (main=0x804f154 <main>, argc=1,
argv=0xbffff9b4,
    init=0x8048efc <_init>, fini=0x8052d9c <_fini>, rtld_fini=0x4000a350
<_dl_fini>,
    stack_end=0xbffff9ac) at ../sysdeps/generic/libc-start.c:78
(gdb) q


-- 
Paul E. Johnson                         email: address@hidden
Dept. of Political Science              http://lark.cc.ukans.edu/~pauljohn
University of Kansas                    Office: (785) 864-9086
Lawrence, Kansas 66045                  FAX: (785) 864-5700

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