int test = 0;

	incr = 0; // Check index+incr where incr is 0 and 1
        status = Tcl_GetDoubleFromObj(interp, valueObj, &y);
        if (status != TCL_OK) {
	    test = 0;
        } else {
            char *vstr = Tcl_GetStringFromObj(valueObj, &vlen);
            index = (y - dblRepPtr->start) / dblRepPtr->step;
	    while (incr<2) {
		Tcl_Obj *elemObj;
		elen = 0;
		TclArithSeriesObjIndex(interp, arithSeriesObjPtr, (index+incr), &elemObj);
		const char *estr = elemObj ? Tcl_GetStringFromObj(elemObj, &elen) : "";
		/* "in" operation defined as a string compare */

	 * both listPtr and objPtr.
	 *
	 * TODO: Create a test to demo this need, or eliminate it.
	 * FIXME OPT: preserve just the internal rep?
	 */

	Tcl_IncrRefCount(objPtr);
	listPtr = TclDuplicatePureObj(interp, objPtr, &tclListType);
	if (!listPtr) {
	    Tcl_DecrRefCount(objPtr);
	    return TCL_ERROR;
	}
	Tcl_IncrRefCount(listPtr);

	if (word != INT_MIN) {
	    /*
	     * TIP #280 Structures for tracking lines. As we know that this is
	     * dynamic execution we ignore the invoker, even if known.
	     *

    /*
     * Break up the value lists and variable lists into elements.
     */

    for (i=0 ; i<numLists ; i++) {
	/* List */
	/* Variables */
	statePtr->vCopyList[i] = Tcl_DuplicateObj(objv[1+i*2]);
	if (!statePtr->vCopyList[i]) {
	    result = TCL_ERROR;
	    goto done;
	}
	result = TclListObjLengthM(interp, statePtr->vCopyList[i],
	    &statePtr->varcList[i]);
	if (result != TCL_OK) {
	    result = TCL_ERROR;

	    if (statePtr->aCopyList[i] == NULL) {
		result = TCL_ERROR;
		goto done;
	    }
	    /* Don't compute values here, wait until the last moment */
	    statePtr->argcList[i] = TclObjTypeLength(statePtr->aCopyList[i]);
	} else {

	    statePtr->aCopyList[i] = TclDuplicatePureObj(
		interp, objv[2+i*2], &tclListType);
	    if (!statePtr->aCopyList[i]) {
		result = TCL_ERROR;
		goto done;
	    }
	    result = TclListObjGetElementsM(interp, statePtr->aCopyList[i],
		&statePtr->argcList[i], &statePtr->argvList[i]);
	    if (result != TCL_OK) {
		goto done;

    int code;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "list ?varName ...?");
	return TCL_ERROR;
    }

    listCopyPtr = TclDuplicatePureObj(interp, objv[1], &tclListType);
    if (!listCopyPtr) {
	return TCL_ERROR;
    }
    Tcl_IncrRefCount(listCopyPtr); /* Important! fs */

    code = TclListObjGetElementsM(
	interp, listCopyPtr, &listObjc, &listObjv);
    if (code != TCL_OK) {

    /*
     * If the list object is unshared we can modify it directly. Otherwise we
     * create a copy to modify: this is "copy on write".
     */

    listPtr = objv[1];
    if (Tcl_IsShared(listPtr)) {
	listPtr = TclDuplicatePureObj(interp, listPtr, &tclListType);
	if (!listPtr) {
	    return TCL_ERROR;
	}
	copied = 1;
    }

    if ((objc == 4) && (index == len)) {
	/*
	 * Special case: insert one element at the end of the list.
	 */

    /*
     * Second, remove the element.
     * TclLsetFlat adds a ref count which is handled.
     */

    if (objc == 2) {
	if (Tcl_IsShared(listPtr)) {
	    listPtr = TclDuplicatePureObj(interp, listPtr, &tclListType);
	    if (!listPtr) {
		return TCL_ERROR;
	    }
	    copied = 1;
	}
	result = Tcl_ListObjReplace(interp, listPtr, listLen - 1, 1, 0, NULL);
	if (result != TCL_OK) {
	    if (copied) {
		Tcl_DecrRefCount(listPtr);
	    }

    }

    /*
     * Make our working copy, then do the actual removes piecemeal.
     */

    if (Tcl_IsShared(listObj)) {
	listObj = TclDuplicatePureObj(interp, listObj, &tclListType);
	if (!listObj) {
	    status = TCL_ERROR;
	    goto done;
	}
	copied = 1;
    }
    num = 0;
    first = listLen;
    for (i = 0, prevIdx = -1 ; i < idxc ; i++) {
	Tcl_Size idx = idxv[i];

    /*
     * If the list object is unshared we can modify it directly, otherwise we
     * create a copy to modify: this is "copy on write".
     */

    listPtr = objv[1];
    if (Tcl_IsShared(listPtr)) {
	listPtr = TclDuplicatePureObj(interp, listPtr, &tclListType);
	if (!listPtr) {
	    return TCL_ERROR;
	}
    }

    /*
     * Note that we call Tcl_ListObjReplace even when numToDelete == 0 and
     * objc == 4. In this case, the list value of listPtr is not changed (no
     * elements are removed or added), but by making the call we are assured
     * we end up with a list in canonical form. Resist any temptation to

	/*
	 * When sorting using a command, we are reentrant and therefore might
	 * have the representation of the list being sorted shimmered out from
	 * underneath our feet. Take a copy (cheap) to prevent this. [Bug
	 * 1675116]
	 */

	listObj = TclDuplicatePureObj(interp ,listObj, &tclListType);
	if (listObj == NULL) {
	    sortInfo.resultCode = TCL_ERROR;
	    goto done;
	}

	/*
	 * The existing command is a list. We want to flatten it, append two

    if (first <= last) {
	numToDelete = last - first + 1;
    } else {
	numToDelete = 0;
    }

    if (Tcl_IsShared(listPtr)) {
	listPtr = TclDuplicatePureObj(interp, listPtr, &tclListType);
	if (!listPtr) {
	    return TCL_ERROR;
	}
	createdNewObj = 1;
    } else {
	createdNewObj = 0;
    }

    result =
	Tcl_ListObjReplace(interp, listPtr, first, numToDelete, objc - 4, objv + 4);

 *   operation w/o causing the Obj value to shimmer into a List.
 *
 * Side Effects --
 *
 *   The intent is to have no side effects.
 *
 */

#if 0 /* Needs rewrite */
static int
DictAsListIndex(
    Tcl_Interp *interp,
    struct Tcl_Obj *objPtr,
    Tcl_Size index,
    Tcl_Obj** elemObjPtr)

			if (nsPtr->parentPtr) {
			    Tcl_AppendStringsToObj(newCmd, "::", NULL);
			}
			Tcl_AppendObjToObj(newCmd, listv[0]);
			Tcl_ListObjReplace(NULL, newList, 0, 1, 1, &newCmd);
			if (patchedDict == NULL) {
			    patchedDict = TclDuplicatePureObj(
				interp, objv[1], &tclDictType);
			    if (!patchedDict) {
				if (allocatedMapFlag) {
				    Tcl_DecrRefCount(mapObj);
				}
				Tcl_DecrRefCount(newList);
				Tcl_DecrRefCount(newCmd);
				Tcl_DecrRefCount(patchedDict);
				return TCL_ERROR;
			    }
			}
			Tcl_DictObjPut(NULL, patchedDict, subcmdWordsObj,
				newList);
		    }
		    Tcl_DictObjNext(&search, &subcmdWordsObj, &listObj,
			    &done);
		} while (!done);

			    if (patchedDict) {
				Tcl_DecrRefCount(patchedDict);
			    }
			    goto freeMapAndError;
			}
			cmd = TclGetString(listv[0]);
			if (!(cmd[0] == ':' && cmd[1] == ':')) {
			    Tcl_Obj *newList = TclDuplicatePureObj(
				interp, listObj, &tclListType);
			    if (!newList) {
				if (patchedDict) {
				    Tcl_DecrRefCount(patchedDict);
				}
				goto freeMapAndError;
			    }
			    Tcl_Obj *newCmd = NewNsObj((Tcl_Namespace*)nsPtr);

			    if (nsPtr->parentPtr) {
				Tcl_AppendStringsToObj(newCmd, "::", NULL);
			    }
			    Tcl_AppendObjToObj(newCmd, listv[0]);
			    Tcl_ListObjReplace(NULL, newList, 0, 1, 1,
				    &newCmd);
			    if (patchedDict == NULL) {
				patchedDict = TclDuplicatePureObj(
				    interp, objv[1], &tclListType);
				if (!patchedDict) {
				    goto freeMapAndError;
				}
			    }
			    Tcl_DictObjPut(NULL, patchedDict, subcmdWordsObj,
				    newList);
			}
			Tcl_DictObjNext(&search, &subcmdWordsObj, &listObj,
				&done);
		    } while (!done);

				 * Will be freed by the dispatch engine. */
	Tcl_Obj **copyObjv;
	Tcl_Size copyObjc, prefixObjc;

	TclListObjLengthM(NULL, prefixObj, &prefixObjc);

	if (objc == 2) {
	    copyPtr = TclDuplicatePureObj(
		interp, prefixObj, &tclListType);
	    if (!copyPtr) {
		return TCL_ERROR;
	    }
	} else {
	    copyPtr = Tcl_NewListObj(objc - 2 + prefixObjc, NULL);
	    Tcl_ListObjAppendList(NULL, copyPtr, prefixObj);
	    Tcl_ListObjReplace(NULL, copyPtr, LIST_MAX, 0,
		    ensemblePtr->numParameters, objv + 1);
	    Tcl_ListObjReplace(NULL, copyPtr, LIST_MAX, 0,
		    objc - 2 - ensemblePtr->numParameters,

    Tcl_Size i, prefixObjc;
    Tcl_Obj **paramv, *unknownCmd, *ensObj;

    /*
     * Create the "unknown" command callback to determine what to do.
     */

    unknownCmd = TclDuplicatePureObj(
	interp, ensemblePtr->unknownHandler, &tclListType);
    if (!unknownCmd) {
	return TCL_ERROR;
    }
    TclNewObj(ensObj);
    Tcl_GetCommandFullName(interp, ensemblePtr->token, ensObj);
    Tcl_ListObjAppendElement(NULL, unknownCmd, ensObj);
    for (i = 1 ; i < objc ; i++) {
	Tcl_ListObjAppendElement(NULL, unknownCmd, objv[i]);
    }
    TclListObjGetElementsM(NULL, unknownCmd, &paramc, &paramv);

	Tcl_Obj **prefixObjv, **tempObjv;

	/*
	 * Note we copy the handler command prefix each pass through, so we do
	 * support one handler setting another handler.
	 */

	Tcl_Obj *copyObj = TclDuplicatePureObj(
	    interp, assocPtr->cmdPrefix, &tclListType);
	if (!copyObj) {
	    return;
	}

	errPtr = assocPtr->firstBgPtr;

	TclListObjGetElementsM(NULL, copyObj, &prefixObjc, &prefixObjv);
	tempObjv = (Tcl_Obj**)Tcl_Alloc((prefixObjc+2) * sizeof(Tcl_Obj *));
	memcpy(tempObjv, prefixObjv, prefixObjc*sizeof(Tcl_Obj *));
	tempObjv[prefixObjc] = errPtr->errorMsg;

    lappendListDirect:
	objResultPtr = varPtr->value.objPtr;
	if (TclListObjLengthM(interp, objResultPtr, &len) != TCL_OK) {
	    TRACE_ERROR(interp);
	    goto gotError;
	}
	if (Tcl_IsShared(objResultPtr)) {
	    Tcl_Obj *newValue;

	    DECACHE_STACK_INFO();
	    newValue = TclDuplicatePureObj(interp, objResultPtr, &tclListType);
	    CACHE_STACK_INFO();

	    if (!newValue) {
		TRACE_ERROR(interp);
		goto gotError;
	    }

	    TclDecrRefCount(objResultPtr);
	    varPtr->value.objPtr = objResultPtr = newValue;
	    Tcl_IncrRefCount(newValue);
	}
	if (TclListObjAppendElements(interp, objResultPtr, objc, objv)
		!= TCL_OK) {

	    if (!objResultPtr) {
		valueToAssign = valuePtr;
	    } else if (TclListObjLengthM(interp, objResultPtr, &len)!=TCL_OK) {
		TRACE_ERROR(interp);
		goto gotError;
	    } else {
		if (Tcl_IsShared(objResultPtr)) {
		    DECACHE_STACK_INFO();
		    valueToAssign = TclDuplicatePureObj(
			interp, objResultPtr, &tclListType);
		    CACHE_STACK_INFO();
		    if (!valueToAssign) {
			goto errorInLappendListPtr;
		    }
		    createdNewObj = 1;
		} else {
		    valueToAssign = objResultPtr;
		}
		if (TclListObjAppendElements(interp, valueToAssign,
			objc, objv) != TCL_OK) {
		    if (createdNewObj) {

	    if (TclListObjLengthM(interp, listPtr, &listLen) != TCL_OK) {
		CACHE_STACK_INFO();
		TRACE_APPEND(("ERROR converting list %" TCL_Z_MODIFIER "d, \"%s\": %s",
			i, O2S(listPtr), O2S(Tcl_GetObjResult(interp))));
		goto gotError;
	    }
	    if (Tcl_IsShared(listPtr)) {
		DECACHE_STACK_INFO();
		objPtr = TclDuplicatePureObj(
		    interp, listPtr, &tclListType);
		CACHE_STACK_INFO();
		if (!objPtr) {
		    goto gotError;
		}
		Tcl_IncrRefCount(objPtr);
		Tcl_DecrRefCount(listPtr);
		OBJ_AT_DEPTH(listTmpDepth) = objPtr;
	    }
	    iterTmp = (listLen + (numVars - 1))/numVars;
	    if (iterTmp > iterMax) {
		iterMax = iterTmp;

				 * interpreters. */
{
    Tcl_Obj *resObj;		/* See below, switch (transmit). */
    Tcl_Size resLen = 0;
    unsigned char *resBuf;
    Tcl_InterpState state = NULL;
    int res = TCL_OK;
    Tcl_Obj *command = TclDuplicatePureObj(
	interp, dataPtr->command, &tclListType);
    if (!command) {
	return TCL_ERROR;
    }
    Tcl_Interp *eval = dataPtr->interp;

    Tcl_Preserve(eval);

    /*
     * Step 1, create the complete command to execute. Do this by appending
     * operation and buffer to operate upon to a copy of the callback

    rcPtr->writeTimer = 0;
#if TCL_THREADS
    rcPtr->thread = Tcl_GetCurrentThread();
#endif
    rcPtr->mode = mode;
    rcPtr->interest = 0;		/* Initially no interest registered */

    rcPtr->cmd = TclDuplicatePureObj(interp, cmdpfxObj, &tclListType);
    if (!rcPtr->cmd) {
	return NULL;
    }
    Tcl_IncrRefCount(rcPtr->cmd);
    rcPtr->methods = Tcl_NewListObj(METH_WRITE + 1, NULL);
    while (mn <= (int)METH_WRITE) {
	Tcl_ListObjAppendElement(NULL, rcPtr->methods,
		Tcl_NewStringObj(methodNames[mn++], -1));
    }
    Tcl_IncrRefCount(rcPtr->methods);

    }

    /*
     * Insert method into the callback command, after the command prefix,
     * before the channel id.
     */

    cmd = TclDuplicatePureObj(NULL, rcPtr->cmd, &tclListType);
    if (!cmd) {
	return TCL_ERROR;
    }
    Tcl_ListObjIndex(NULL, rcPtr->methods, method, &methObj);
    Tcl_ListObjAppendElement(NULL, cmd, methObj);
    Tcl_ListObjAppendElement(NULL, cmd, rcPtr->name);

    /*
     * Append the additional argument containing method specific details
     * behind the channel id. If specified.

			    Tcl_CmdDeleteProc *deleteProc);
MODULE_SCOPE Tcl_Command TclCreateEnsembleInNs(Tcl_Interp *interp,
			    const char *name, Tcl_Namespace *nameNamespacePtr,
			    Tcl_Namespace *ensembleNamespacePtr, int flags);
MODULE_SCOPE void	TclDeleteNamespaceVars(Namespace *nsPtr);
MODULE_SCOPE void	TclDeleteNamespaceChildren(Namespace *nsPtr);
MODULE_SCOPE Tcl_Size	TclDictGetSize(Tcl_Obj *dictPtr);
MODULE_SCOPE Tcl_Obj *TclDuplicatePureObj(Tcl_Interp *interp,
			    Tcl_Obj * objPtr, const Tcl_ObjType *typPtr);
MODULE_SCOPE int	TclFindDictElement(Tcl_Interp *interp,
			    const char *dict, Tcl_Size dictLength,
			    const char **elementPtr, const char **nextPtr,
			    Tcl_Size *sizePtr, int *literalPtr);
/* TIP #280 - Modified token based evaluation, with line information. */
MODULE_SCOPE int	TclEvalEx(Tcl_Interp *interp, const char *script,
			    Tcl_Size numBytes, int flags, Tcl_Size line,

			    Tcl_Obj *listPtr, Tcl_Obj *argPtr);
MODULE_SCOPE Tcl_Obj *	TclLindexFlat(Tcl_Interp *interp, Tcl_Obj *listPtr,
			    Tcl_Size indexCount, Tcl_Obj *const indexArray[]);
MODULE_SCOPE Tcl_Obj *	TclListObjGetElement(Tcl_Obj *listObj, Tcl_Size index);
/* TIP #280 */
MODULE_SCOPE void	TclListLines(Tcl_Obj *listObj, Tcl_Size line, Tcl_Size n,
			    Tcl_Size *lines, Tcl_Obj *const *elems);

MODULE_SCOPE int	TclListObjAppendElements(Tcl_Interp *interp,
			    Tcl_Obj *toObj, Tcl_Size elemCount,
			    Tcl_Obj *const elemObjv[]);
MODULE_SCOPE Tcl_Obj *	TclListObjRange(Tcl_Interp *interp, Tcl_Obj *listPtr,
			    Tcl_Size fromIdx, Tcl_Size toIdx);
MODULE_SCOPE Tcl_Obj *	TclLsetList(Tcl_Interp *interp, Tcl_Obj *listPtr,
			    Tcl_Obj *indexPtr, Tcl_Obj *valuePtr);

	ListObjReplaceRepAndInvalidate(objPtr, &listRep);
    } else {
	TclFreeInternalRep(objPtr);
	TclInvalidateStringRep(objPtr);
	Tcl_InitStringRep(objPtr, NULL, 0);
    }
}













































/*
 *------------------------------------------------------------------------
 *
 * ListRepRange --
 *
 *	Initializes a ListRep as a range within the passed ListRep.

    Tcl_Obj *listObj,		/* List being unpacked. */
    Tcl_Obj *argObj)		/* Index or index list. */
{
    Tcl_Size index;			/* Index into the list. */
    Tcl_Obj *indexListCopy;
    Tcl_Obj **indexObjs;
    Tcl_Size numIndexObjs;
    int status;

    /*
     * Determine whether argPtr designates a list or a single index. We have
     * to be careful about the order of the checks to avoid repeated
     * shimmering; if internal rep is already a list do not shimmer it.
     * see TIP#22 and TIP#33 for the details.
     */
    if (!TclHasInternalRep(argObj, &tclListType)
	&& TclGetIntForIndexM(NULL, argObj, TCL_SIZE_MAX - 1, &index)
	       == TCL_OK) {
	/*
	 * argPtr designates a single index.
	 */
	return TclLindexFlat(interp, listObj, 1, &argObj);
    }

    /*
     * Make a private copy of the index list argument to keep the internal
     * representation of the indices array unchanged while it is in use.  This
     * is probably unnecessary. It does not appear that any damaging change to
     * the internal representation is possible, and no test has been devised to
     * show any error when this private copy is not made, But it's cheap, and
     * it offers some future-proofing insurance in case the TclLindexFlat
     * implementation changes in some unexpected way, or some new form of trace
     * or callback permits things to happen that the current implementation
     * does not.
     */

    indexListCopy = TclDuplicatePureObj(interp, argObj, &tclListType);
    if (!indexListCopy) {
	/*
	 * The argument is neither an index nor a well-formed list.
	 * Report the error via TclLindexFlat.
	 * TODO - This is as original code. why not directly return an error?
	 */
	return TclLindexFlat(interp, listObj, 1, &argObj);
    }
    status = TclListObjGetElementsM(
	interp, indexListCopy, &numIndexObjs, &indexObjs);
    if (status != TCL_OK) {
	Tcl_DecrRefCount(indexListCopy);
	/*
	 * The argument is neither an index nor a well-formed list.
	 * Report the error via TclLindexFlat.
	 * TODO - This is as original code. why not directly return an error?
	 */
	return TclLindexFlat(interp, listObj, 1, &argObj);
    }
    listObj = TclLindexFlat(interp, listObj, numIndexObjs, indexObjs);
    Tcl_DecrRefCount(indexListCopy);
    return listObj;
}

/*
 *----------------------------------------------------------------------

	    /* indexArgPtr designates a single index. */
	    /* T:listrep-1.{2.1,12.1,15.1,19.1},2.{2.3,9.3,10.1,13.1,16.1}, 3.{4,5,6}.3 */
	    retValueObj = TclLsetFlat(interp, listObj, 1, &indexArgObj, valueObj);
	}

    } else {

	indexListCopy = TclDuplicatePureObj(
	    interp, indexArgObj, &tclListType);
	if (!indexListCopy) {
	    /*
	     * indexArgPtr designates something that is neither an index nor a
	     * well formed list. Report the error via TclLsetFlat.
	     */
	    retValueObj = TclLsetFlat(interp, listObj, 1, &indexArgObj, valueObj);
	} else {

    Tcl_Obj *listObj,		/* Pointer to the list being modified. */
    Tcl_Size indexCount,		/* Number of index args. */
    Tcl_Obj *const indexArray[],
				/* Index args. */
    Tcl_Obj *valueObj)		/* Value arg to 'lset' or NULL to 'lpop'. */
{
    Tcl_Size index, len;
    int copied = 0, result;
    Tcl_Obj *subListObj, *retValueObj;
    Tcl_Obj *pendingInvalidates[10];
    Tcl_Obj **pendingInvalidatesPtr = pendingInvalidates;
    Tcl_Size numPendingInvalidates = 0;

    /*
     * If there are no indices, simply return the new value.  (Without
     * indices, [lset] is a synonym for [set].
     * [lpop] does not use this but protect for NULL valueObj just in case.
     */

    if (indexCount == 0) {
	if (valueObj != NULL) {
	    Tcl_IncrRefCount(valueObj);
	}
	return valueObj;
    }

    /*
     * If the list is shared, make a copy to modify (copy-on-write). The string






     * representation and internal representation of listObj remains unchanged.
     */

    subListObj = Tcl_IsShared(listObj)
	? TclDuplicatePureObj(interp, listObj, &tclListType) : listObj;
    if (!subListObj) {
	return NULL;
    }

    /*
     * Anchor the linked list of Tcl_Obj's whose string reps must be
     * invalidated if the operation succeeds.
     */

    retValueObj = subListObj;

		                 NULL);
	    }
	    result = TCL_ERROR;
	    break;
	}

	/*
	 * No error conditions.  If this is not the last index, determine the
	 * next sublist for the next pass through the loop, and take steps to

	 * make sure it is unshared in order to modify it.
	 */

	if (--indexCount) {
	    parentList = subListObj;
	    if (index == elemCount) {
		TclNewObj(subListObj);
	    } else {
		subListObj = elemPtrs[index];
	    }
	    if (Tcl_IsShared(subListObj)) {
		subListObj = TclDuplicatePureObj(
		    interp, subListObj, &tclListType);
		if (!subListObj) {
		    return NULL;
		}
		copied = 1;
	    }

	    /*
	     * Replace the original elemPtr[index] in parentList with a copy
	     * we know to be unshared.  This call will also deal with the
	     * situation where parentList shares its internalrep with other
	     * Tcl_Obj's.  Dealing with the shared internalrep case can
	     * cause subListObj to become shared again, so detect that case
	     * and make and store another copy.
	     */

	    if (index == elemCount) {
		Tcl_ListObjAppendElement(NULL, parentList, subListObj);
	    } else {
		TclListObjSetElement(NULL, parentList, index, subListObj);
	    }
	    if (Tcl_IsShared(subListObj)) {
		Tcl_Obj * newSubListObj;
		newSubListObj = TclDuplicatePureObj(
		    interp, subListObj, &tclListType);
		if (copied) {
		    Tcl_DecrRefCount(subListObj);
		}
		if (newSubListObj) {
		    subListObj = newSubListObj;
		} else {
		    return NULL;
		}
		TclListObjSetElement(NULL, parentList, index, subListObj);
	    }

	    /*
	     * The TclListObjSetElement() calls do not spoil the string rep
	     * of parentList, and that's fine for now, since all we've done
	     * so far is replace a list element with an unshared copy.  The

static void		UpdateStringOfDouble(Tcl_Obj *objPtr);
static void		UpdateStringOfInt(Tcl_Obj *objPtr);
static void		FreeBignum(Tcl_Obj *objPtr);
static void		DupBignum(Tcl_Obj *objPtr, Tcl_Obj *copyPtr);
static void		UpdateStringOfBignum(Tcl_Obj *objPtr);
static int		GetBignumFromObj(Tcl_Interp *interp, Tcl_Obj *objPtr,
			    int copy, mp_int *bignumValue);
static int		SetDuplicatePureObj(Tcl_Interp *interp,
			    Tcl_Obj *dupPtr, Tcl_Obj *objPtr,
			    const Tcl_ObjType *typePtr);

/*
 * Prototypes for the array hash key methods.
 */

static Tcl_HashEntry *	AllocObjEntry(Tcl_HashTable *tablePtr, void *keyPtr);

 *----------------------------------------------------------------------
 *
 * Tcl_DuplicateObj --
 *
 *	Create and return a new object that is a duplicate of the argument
 *	object.
 *
 * TclDuplicatePureObj --
 *	Like Tcl_DuplicateObj, except that it converts the duplicate to the
 *	specifid typ, does not duplicate the 'bytes'
 *	field unless it is necessary, i.e. the duplicated Tcl_Obj provides no
 *	updateStringProc.  This can avoid an expensive memory allocation since
 *	the data in the 'bytes' field of each Tcl_Obj must reside in allocated
 *	memory.
 *
 * Results:
 *	The return value is a pointer to a newly created Tcl_Obj. This object
 *	has reference count 0 and the same type, if any, as the source object
 *	objPtr. Also:
 *	  1) If the source object has a valid string rep, we copy it;
 *	     otherwise, the duplicate's string rep is set NULL to mark it
 *	     invalid.

{
    Tcl_Obj *dupPtr;

    TclNewObj(dupPtr);
    SetDuplicateObj(dupPtr, objPtr);
    return dupPtr;
}


/*
 *----------------------------------------------------------------------
 *
 * TclDuplicatePureObj --
 *
 *	Duplicates a Tcl_Obj and converts the internal representation of the
 *	duplicate to the given type, changing neither the 'bytes' field
 *	nor the internal representation of the original object, and without
 *	duplicating the bytes field unless necessary, i.e. unless the
 *	duplicate provides no updateStringProc after conversion.  This can
 *	avoid an expensive memory allocation since the data in the 'bytes'
 *	field of each Tcl_Obj must reside in allocated memory.
 *
 * Results:
 *	A pointer to a newly-created Tcl_Obj or NULL if there was an error.
 *	This object has reference count 0.  Also:
 *
 *----------------------------------------------------------------------
 */
int SetDuplicatePureObj(
    Tcl_Interp *interp,
    Tcl_Obj *dupPtr,
    Tcl_Obj *objPtr,
    const Tcl_ObjType *typePtr)
{
    char *bytes = objPtr->bytes;
    int status = TCL_OK;
    const Tcl_ObjType *useTypePtr =
        objPtr->typePtr ? objPtr->typePtr : typePtr;

    TclInvalidateStringRep(dupPtr);
    assert(dupPtr->typePtr == NULL);

    if (objPtr->typePtr && objPtr->typePtr->dupIntRepProc) {
	objPtr->typePtr->dupIntRepProc(objPtr, dupPtr);
    } else {
	dupPtr->internalRep = objPtr->internalRep;
	dupPtr->typePtr = objPtr->typePtr;
    }

    if (typePtr != NULL && dupPtr->typePtr != useTypePtr) {
	if (bytes) {
	    dupPtr->bytes = bytes;
	    dupPtr->length = objPtr->length;
	}
	/* borrow bytes from original object */
	status = Tcl_ConvertToType(interp, dupPtr, useTypePtr);
	if (bytes) {
	    dupPtr->bytes = NULL;
	    dupPtr->length = 0;
	}
	if (status != TCL_OK) {
	    return status;
	}
    }

    /* tclStringType is treated as a special case because a Tcl_Obj having this
     * type can not always update the string representation.  This happens, for
     * example, when Tcl_GetCharLength() converts the internal representation
     * to tclStringType in order to store the number of characters, but does
     * not store enough information to generate the string representation.
     *
     * Perhaps in the future this can be remedied and this special treatment
     * removed.
     */


    if (bytes && (dupPtr->typePtr == NULL
	|| dupPtr->typePtr->updateStringProc == NULL
	|| useTypePtr == &tclStringType
	)
    ) {
	if (!TclAttemptInitStringRep(dupPtr, bytes, objPtr->length)) {
	    if (interp) {
		Tcl_SetObjResult(interp, Tcl_NewStringObj(
			"insufficient memory to initialize string", -1));
		Tcl_SetErrorCode(interp, "TCL", "MEMORY", NULL);
	    }
	    status = TCL_ERROR;
	}
    }
    return status;
}

Tcl_Obj *
TclDuplicatePureObj(
    Tcl_Interp *interp,
    Tcl_Obj *objPtr,
    const Tcl_ObjType *typePtr
)		/* The object to duplicate. */
{
    int status;
    Tcl_Obj *dupPtr;

    TclNewObj(dupPtr);
    status = SetDuplicatePureObj(interp, dupPtr, objPtr, typePtr);
    if (status == TCL_OK) {
	return dupPtr;
    } else {
	Tcl_DecrRefCount(dupPtr);
	return NULL;
    }
}



void
TclSetDuplicateObj(
    Tcl_Obj *dupPtr,
    Tcl_Obj *objPtr)
{
    if (Tcl_IsShared(dupPtr)) {

		    /* Abandon ship! */
		    Tcl_DecrRefCount(resPtr);
		    Tcl_BounceRefCount(elemPtr); // could be an abstract list element
		    goto slow;
		}
		Tcl_BounceRefCount(elemPtr); // could be an an abstract list element
	    } else {
		resPtr = TclDuplicatePureObj(
		    NULL, objPtr, &tclListType);
		if (!resPtr) {
		    return NULL;
		}
	    }
	}
	if (!resPtr) {
	    TclNewObj(resPtr);
	}
	return resPtr;
    }

    ArrayPopulateSearch(interp, arrayNameObj, varPtr, searchPtr);

    /*
     * Make sure that these objects (which we need throughout the body of the
     * loop) don't vanish.
     */

    varListObj = TclDuplicatePureObj(interp, objv[1], &tclListType);
    if (!varListObj) {
	return TCL_ERROR;
    }
    scriptObj = objv[3];
    Tcl_IncrRefCount(scriptObj);

    /*

	/*
	 * We needn't worry about traces invalidating arrayPtr: should that be
	 * the case, TclPtrSetVarIdx will return NULL so that we break out of
	 * the loop and return an error.
	 */

	copyListObj =
	    TclDuplicatePureObj(interp, arrayElemObj, &tclListType);
	if (!copyListObj) {
	    return TCL_ERROR;
	}
	for (i=0 ; i<elemLen ; i+=2) {
	    Var *elemVarPtr = TclLookupArrayElement(interp, arrayNameObj,
		    elemPtrs[i], TCL_LEAVE_ERR_MSG, "set", 1, 1, varPtr, -1);