[Sbcl-help] Unhandled breakpoint/trap ??

[cph <cp...@ch...>]

Hi,

Could someone please tell me how to debug the following?

  Unhandled breakpoint/trap at #x7FEFCEC3C63.
     [Condition of type SB-SYS:BREAKPOINT-ERROR]

  Restarts:
   0: [REMOVE] Exit and remove source callback
   1: [CONTINUE] Return from source callback
   2: [RE-INVOKE] Re-invoke source callback
   3: [RETRY] Retry SLIME REPL evaluation request.
   4: [*PROCESS-INPUT] Continue reading input.
   5: [ABORT] Return to SLIME's top level.
   --more--

  Backtrace:
    0: (SB-KERNEL::UNHANDLED-TRAP-ERROR #.(SB-SYS:INT-SAP #X0022C240))
        Locals:
          SB-DEBUG::ARG-0 = #.(SB-SYS:INT-SAP #X0022C240)
    1: ("foreign function: #x42F4AC")
        [No Locals]
    2: ((LAMBDA (HEAT-ATLAS::GC) :IN HEAT-ATLAS::SELECTED-PANELS) #<GDK:GC at 0x596BE90>)
    3: ((LAMBDA NIL :IN START-MARCHING))
    4: (GLIB:INVOKE-SOURCE-CALLBACK 1462)
    5: (GLIB::SOURCE-CALLBACK-MARSHAL 1462)
    6: ((LAMBDA (SB-ALIEN::ARGS-POINTER SB-ALIEN::RESULT-POINTER FUNCTION) :IN "c:/home/clg/glib/gcallback.fasl") 1142816 1142812 #<FUNCTION GLIB::SOURCE-CALLBACK-MARSHAL>)
    7: ("foreign function: #x42F4AC")
    8: (SB-INT:SIMPLE-EVAL-IN-LEXENV (RUN) #<NULL-LEXENV>)

This is on Windows with both 32-bit and 64-bit SBCL 1.3.5.  I did a grep
in the source code of SBCL and it looks like it can only happen on
Windows?  Right now I'm clueless about how to debug it.  I'll be very
grateful if somebody could show me where and how to start.

Best wishes

-cph