} else {
	    result = NULL;
	}
	return ThreadCancel(interp, (Tcl_ThreadId) INT2PTR(id), result, flags);
    }
    case THREAD_CREATE: {
	const char *script;
	int joinable;
	Tcl_Size len;

	if (objc == 2) {
	    /*
	     * Neither joinable nor special script
	     */

	    joinable = 0;

    if (!found) {
	Tcl_MutexUnlock(&threadMutex);
	Tcl_AppendResult(interp, "invalid thread id", NULL);
	return TCL_ERROR;
    }

    /*
     * Short circuit sends to ourself. Ought to do something with -async, like
     * run in an idle handler.
     */

    if (threadId == Tcl_GetCurrentThread()) {
	Tcl_MutexUnlock(&threadMutex);
	return Tcl_EvalEx(interp, script,-1,TCL_EVAL_GLOBAL);
    }