Runtime error I don't understand

[pauljohn]

I've been renaming objects and moving things around in a program,
making little changes, then checking.  Now I've hit a point
where it compiles without trouble, and it starts up and
shows a control panel, but after it starts it crashes
with this cryptic output:

dist: 1.897218, cos(angle):0.946970, sin(angle): 0.321321 
pi, 3.141593 , sin(pi), 0.000000 proposal: 3.796610,4.609615, SQ: 
2.000000,4.0000, Angle: 0.104127 
error: ModelSwarm (instance)
¤çŸ,:
  ¤çŸøŸØY
    X÷ÿ¿øŸc:
           ¤çŸc:
  Xq
   Ôêq
d÷ÿ¿„÷ÿ¿øŸXq
           address@hidden does not recognize error: ModelSwarm (instance)
%s does not recognize %s

Aborted (core dumped)

So I read about this gdb thing and run the program in there, 
and the backtrace is:

(gdb) bt
#0  0x402416a1 in __kill ()
#1  0x402414cf in raise (sig=6) at ../sysdeps/posix/raise.c:27
#2  0x402426df in abort () at ../sysdeps/generic/abort.c:83
#3  0x8088b98 in objc_verror ()
#4  0x8088b49 in objc_error ()
#5  0x80898ee in _i_Object__error_ ()
#6  0x8089773 in _i_Object__doesNotRecognize_ ()
#7  0x8089542 in _i_Object__forward__ ()
#8  0x8081df9 in __objc_forward ()
#9  0x8081c37 in __objc_word_forward ()
#10 0x804b88a in _i_Recruiter__evaluate_P_C_ (self=0x81796e0, _cmd=0x80aed24,
    list=0x816e0a0, prope=0x816e130, curre=0x816e628) at Recruiter.m:83
#11 0x8075bb7 in _i_Object_s__perform_with_with_with_ (self=0x81796e0, 
    _cmd=0x80b88e0, aSel=0x80aed24, anObject1=0x816e0a0, anObject2=0x816e130,
    anObject3=0x816e628) at DefObject.m:499
#12 0x805ffd9 in _i_ActionTo_3___performAction__ (self=0x8195150, 
    _cmd=0x80b8b80, anActivity=0x819fed0) at Action.m:331
#13 0x806023c in _i_Activity_c___run_ (self=0x819fed0, _cmd=0x80b8b68)
    at XActivity.m:162
#14 0x8060194 in _i_Activity_c___run_ (self=0x819e8b8, _cmd=0x80b8b68)
    at XActivity.m:133
#15 0x8060194 in _i_Activity_c___run_ (self=0x819e7b8, _cmd=0x80b8b68)
    at XActivity.m:133
#16 0x8060194 in _i_Activity_c___run_ (self=0x819edd0, _cmd=0x80b8b68)
    at XActivity.m:133
#17 0x8060194 in _i_Activity_c___run_ (self=0x818d0f8, _cmd=0x80b8b50)
    at XActivity.m:133
#18 0x8060775 in _i_Activity_c__run (self=0x818d0f8, _cmd=0x80b06e0)
    at XActivity.m:72


I've stepped through the code step by step and the last piece
of code before the disaster starts is [ObserverSwarm go], but
I can't say more than that.

I could use some gdb pointers, I guess. 
paul



-- 
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
University of Kansas                  Office: (913) 864-9086
Lawrence, Kansas 66045                FAX: (913) 864-5700


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