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Insight crash


I got a segv from Insight.
Stack trace appended.

The scenario: while debugging gcj I put a `tree' variable into the
watch window.  I looked at the tree a bit (a tree is a big hairy
union; I expanded one branch, looked around, and then collapsed it all
back to a single line).  When I `next'ed (using the GUI) over a
statement which changed the variable, Insight crashed.

Tom

(gdb) bt
#0  Tcl_NextHashEntry (searchPtr=0xbfffedd0)
    at ../../../src/tcl/unix/../generic/tclHash.c:274
#1  0x823f98f in Tcl_FirstHashEntry (tablePtr=0xbfffba60, searchPtr=0xbfffedd0)
    at ../../../src/tcl/unix/../generic/tclHash.c:234
#2  0x825c50f in TclDeleteVars (iPtr=0x8323968, tablePtr=0xbfffba60)
    at ../../../src/tcl/unix/../generic/tclVar.c:4257
#3  0x824c0a7 in Tcl_PopCallFrame (interp=0x8323968)
    at ../../../src/tcl/unix/../generic/tclNamesp.c:391
#4  0x8255675 in TclObjInterpProc (clientData=0x86ac800, interp=0x8323968, 
    objc=2, objv=0x83245d8) at ../../../src/tcl/unix/../generic/tclProc.c:1029
#5  0x8236f02 in TclExecuteByteCode (interp=0x8323968, codePtr=0x8ad2678)
    at ../../../src/tcl/unix/../generic/tclExecute.c:955
#6  0x821d2dc in Tcl_EvalObj (interp=0x8323968, objPtr=0x840fd30)
    at ../../../src/tcl/unix/../generic/tclBasic.c:2645
#7  0x821d09a in Tcl_Eval (interp=0x8323968, 
    string=0xbffff6b8 "TOOLBAR_button_up .srcwin0.srcwin.container.pane0.childsite.con.t.next") at ../../../src/tcl/unix/../generic/tclBasic.c:2453
#8  0x821e7cc in Tcl_GlobalEval (interp=0x8323968, 
    command=0xbffff6b8 "TOOLBAR_button_up .srcwin0.srcwin.container.pane0.childsite.con.t.next") at ../../../src/tcl/unix/../generic/tclBasic.c:3983
#9  0x820b16d in Tk_BindEvent (bindingTable=0x83428d0, eventPtr=0x8c067c0, 
    tkwin=0x86aee80, numObjects=0, objectPtr=0xbffff7b8)
    at ../../../src/tk/unix/../generic/tkBind.c:1731
#10 0x820efac in TkBindEventProc (winPtr=0x86aee80, eventPtr=0x8c067c0)
    at ../../../src/tk/unix/../generic/tkCmds.c:242
#11 0x81bd918 in Tk_HandleEvent (eventPtr=0x8c067c0)
    at ../../../src/tk/unix/../generic/tkEvent.c:657
#12 0x81bdc89 in WindowEventProc (evPtr=0x8c067b8, flags=-3)
    at ../../../src/tk/unix/../generic/tkEvent.c:983
#13 0x824ed60 in Tcl_ServiceEvent (flags=-3)
    at ../../../src/tcl/unix/../generic/tclNotify.c:444
#14 0x824ef76 in Tcl_DoOneEvent (flags=0)
    at ../../../src/tcl/unix/../generic/tclNotify.c:683
#15 0x81bdcf4 in Tk_MainLoop ()
    at ../../../src/tk/unix/../generic/tkEvent.c:1041
#16 0x80c2ccc in tk_command_loop ()
    at ../../src/gdb/gdbtk/generic/gdbtk-hooks.c:383
#17 0x807cca2 in captured_command_loop (data=0x0) at ../../src/gdb/main.c:104
#18 0x80da7db in catch_errors (func=0x807cc80 <captured_command_loop>, 
    args=0x0, errstring=0x8262c5e "", mask=6) at ../../src/gdb/top.c:615
#19 0x807d8f3 in captured_main (data=0xbffffb58) at ../../src/gdb/main.c:749
#20 0x80da7db in catch_errors (func=0x807ccd0 <captured_main>, 
    args=0xbffffb58, errstring=0x8262c5e "", mask=6) at ../../src/gdb/top.c:615
#21 0x807d927 in main (argc=2, argv=0xbffffb7c) at ../../src/gdb/main.c:761

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