(gdb) bt full
#0  0x00000000 in ?? ()
No symbol table info available.
#1  0xb7e946ba in FindCommandObjCmd (clientData=0x0, interp=0x804d5c0, objc=2, objv=0x804f3a4)
    at fc.c:15
        cmd = (Tcl_Command) 0x80606a0
        cmdName = 0x80570f8 "whatever"
#2  0xb7ec46d5 in TclEvalObjvInternal (interp=0x804d5c0, objc=2, objv=0x804f3a4, command=0x0,
    length=0, flags=0) at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclBasic.c:3219
        cmdPtr = (Command *) 0x8060928
        iPtr = (Interp *) 0x804d5c0
        newObjv = (Tcl_Obj **) 0x80563e0
        i = 134613288
        savedVarFramePtr = (CallFrame *) 0x0
        code = 0
        traceCode = 0
        checkTraces = 1
        savedNsPtr = (Namespace *) 0x0
#3  0xb7ef76bb in TclExecuteByteCode (interp=0x804d5c0, codePtr=0x80609a8)
    at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclExecute.c:1582
        objc = 2
        objv = (Tcl_Obj **) 0x804f3a4
        preservedStackRefCountPtr = (char **) 0x804f3a0
        iPtr = (Interp *) 0x804d5c0
        eePtr = (ExecEnv *) 0x804c0b8
        stackPtr = (Tcl_Obj **) 0x804f3a4
        stackTop = 1
        pc = (unsigned char *) 0x8060a14 "\006\002"
        opnd = 2
        pcAdjustment = 2
        initStackTop = -1
        rangePtr = (ExceptionRange *) 0xb7e50170
        result = 0
        storeFlags = 32
        valuePtr = (Tcl_Obj *) 0x8055c78
        value2Ptr = (Tcl_Obj *) 0xb7e4eff4
        objPtr = (Tcl_Obj *) 0xb7e50140
        bytes = 0x0
        length = 0
        i = 0
---Type <return> to continue, or q <return> to quit---
        w = -5190908795344806208
        cleanup = -1
        objResultPtr = (Tcl_Obj *) 0x806eb98
        part1 = 0xd22fc <Address 0xd22fc out of bounds>
        part2 = 0x0
        varPtr = (Var *) 0xb7f62ff4
        arrayPtr = (Var *) 0xb7f2a5f7
        varFramePtr = (CallFrame *) 0x0
        curInstName = 0x0
        catchStackStorage = {-1078621768, 0, 200, -1078621952}
        catchStackPtr = (int *) 0xbfb589ac
        catchTop = -1
#4  0xb7ef67f4 in TclCompEvalObj (interp=0x804d5c0, objPtr=0x8055a80)
    at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclExecute.c:1107
        iPtr = (Interp *) 0x804d5c0
        codePtr = (ByteCode *) 0x80609a8
        oldCount = 374
        script = 0xbfb58c08 "\210\214��eZ����\004\b\200Z\005\b�\t\006\b8\214��y�ط@\001巨\t\006\b��\004\b����"
        numSrcBytes = 21
        result = 0
        namespacePtr = (Namespace *) 0x804c2f0
#5  0xb7ec5a65 in Tcl_EvalObjEx (interp=0x804d5c0, objPtr=0x8055a80, flags=131072)
    at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclBasic.c:4618
        iPtr = (Interp *) 0x804d5c0
        script = 0xbfb58c88 "�\214��\030\223����\004\b\200Z\005\b"
        numSrcBytes = -1208602636
        result = -1208835243
        savedVarFramePtr = (CallFrame *) 0x0
        allowExceptions = 0
#6  0xb7f09318 in Tcl_RecordAndEvalObj (interp=0x804d5c0, cmdPtr=0x8055a80, flags=131072)
    at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclHistory.c:142
        result = 0
        list = {0x80592c0, 0x806eb98, 0x8055a80}
        objPtr = (Tcl_Obj *) 0x8058ff0
#7  0xb7f24810 in Tcl_Main (argc=-1, argv=0xbfb58fa8, appInitProc=0x804869b <Tcl_AppInit>)
    at /usr/local/src/SOURCES/tcl8.4.19/unix/../generic/tclMain.c:393
        resultPtr = (Tcl_Obj *) 0x8055a38
        argvPtr = (Tcl_Obj *) 0x8055d98
---Type <return> to continue, or q <return> to quit---
        commandPtr = (Tcl_Obj *) 0x8055a80
        prompt = PROMPT_START
        code = 0
        length = 20
        tty = 1
        exitCode = 0
        inChannel = (Tcl_Channel) 0x8064988
        outChannel = (Tcl_Channel) 0x8064850
        errChannel = (Tcl_Channel) 0x8064ad0
        interp = (Tcl_Interp *) 0x804d5c0
        appName = {string = 0xbfb58de4 "", length = 0, spaceAvl = 200,
  staticSpace = "\000clsh8.4g\000��\224\202\004\b|\216��\\���\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\001\000\000\000\000\000\000\000\f����\223\000\000\000\000\000\000\000\000\000\000\210\216��\030\217���\216�������\203\004\bP\212�\000\f���", '\0' <repeats 12 times>, "\001\000\000\000F\b\000\0008�������.\204\004\b\234\030ӷ�\202\004\b\001\000\000\000��������\f\217��(\217���\t��\000���\f\217��^2$\n����\224\202\004\b�����\216����������\000\000\000\000\001\000\000"}
        objPtr = (Tcl_Obj *) 0x8055db0
#8  0x0804868c in main (argc=Cannot access memory at address 0x0
) at /usr/local/src/SOURCES/tcl8.4.19/unix/tclAppInit.c:90
No locals.
(gdb)