&& (contextPtr->nline >= 4) && (contextPtr->line[3] >= 0)) {
		int isNew;
		Tcl_HashEntry *hePtr;
		CmdFrame *cfPtr = (CmdFrame *)Tcl_Alloc(sizeof(CmdFrame));

		cfPtr->level = -1;
		cfPtr->type = contextPtr->type;
		cfPtr->line = (int *)Tcl_Alloc(sizeof(int));
		cfPtr->line = (Tcl_Size *)Tcl_Alloc(sizeof(Tcl_Size));
		cfPtr->line[0] = contextPtr->line[3];
		cfPtr->nline = 1;
		cfPtr->framePtr = NULL;
		cfPtr->nextPtr = NULL;

		cfPtr->data.eval.path = contextPtr->data.eval.path;
		Tcl_IncrRefCount(cfPtr->data.eval.path);

	    /*
	     * We can record source location within a lambda only if the body
	     * was not created by substitution.
	     */

	    if (contextPtr->line
		    && (contextPtr->nline >= 2) && (contextPtr->line[1] >= 0)) {
		int buf[2];
		Tcl_Size buf[2];

		/*
		 * Move from approximation (line of list cmd word) to actual
		 * location (line of 2nd list element).
		 */

		cfPtr = (CmdFrame *)Tcl_Alloc(sizeof(CmdFrame));
		TclListLines(objPtr, contextPtr->line[1], 2, buf, NULL);

		cfPtr->level = -1;
		cfPtr->type = contextPtr->type;
		cfPtr->line = (int *)Tcl_Alloc(sizeof(int));
		cfPtr->line = (Tcl_Size *)Tcl_Alloc(sizeof(Tcl_Size));
		cfPtr->line[0] = buf[1];
		cfPtr->nline = 1;
		cfPtr->framePtr = NULL;
		cfPtr->nextPtr = NULL;

		cfPtr->data.eval.path = contextPtr->data.eval.path;
		Tcl_IncrRefCount(cfPtr->data.eval.path);