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diff --git a/js/src/jsregexp.c b/js/src/jsregexp.c
--- js/src/jsregexp.c
+++ js/src/jsregexp.c
@@ -4148,20 +4148,22 @@ js_NewRegExpObject(JSContext *cx, JSToke
JSString *str;
JSObject *obj;
JSRegExp *re;
JSTempValueRooter tvr;
str = js_NewStringCopyN(cx, chars, length, 0);
if (!str)
return NULL;
+ JS_PUSH_TEMP_ROOT_STRING(cx, str, &tvr);
re = js_NewRegExp(cx, ts, str, flags, JS_FALSE);
- if (!re)
- return NULL;
- JS_PUSH_TEMP_ROOT_STRING(cx, str, &tvr);
+ if (!re) {
+ JS_POP_TEMP_ROOT(cx, &tvr);
+ return NULL;
+ }
obj = js_NewObject(cx, &js_RegExpClass, NULL, NULL);
if (!obj || !JS_SetPrivate(cx, obj, re)) {
js_DestroyRegExp(cx, re);
obj = NULL;
}
if (obj && !js_SetLastIndex(cx, obj, 0))
obj = NULL;
JS_POP_TEMP_ROOT(cx, &tvr);
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