(JSContext* cx, size_t index) {     JSRuntime* rt = cx->runtime();      if (!rt->scriptAndCountsVector || index >= rt->scriptAndCountsVector->length()) {         JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BUFFER_TOO_SMALL);         return nullptr;     }      const ScriptAndCounts& sac = (*rt->scriptAndCountsVector)[index];     