new file mode 100644
--- /dev/null
+++ b/js/src/jit-test/tests/auto-regress/bug1263558.js
@@ -0,0 +1,16 @@
+if (!('oomTest' in this))
+    quit();
+
+evalcx(`
+    eval('\
+        var appendToActual = function(s) {};\
+        gczeal = function() {};\
+        gcslice = function() {};\
+        selectforgc = function() {};\
+        if (!("verifyprebarriers" in this)) {\
+            verifyprebarriers = function() {};\
+        }\
+    ');
+    oomTest(() => eval('Array(..."")'));
+    Intl.NumberFormat.prototype.format(0);
+`, newGlobal());

--- a/js/src/jsstr.cpp
+++ b/js/src/jsstr.cpp
@@ -2762,35 +2762,35 @@ js::InitStringClass(JSContext* cx, Handl
 
     /* Now create the String function. */
     RootedFunction ctor(cx);
     ctor = global->createConstructor(cx, StringConstructor, cx->names().String, 1,
                                      AllocKind::FUNCTION, &jit::JitInfo_String);
     if (!ctor)
         return nullptr;
 
-    if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_String, ctor, proto))
-        return nullptr;
-
     if (!LinkConstructorAndPrototype(cx, ctor, proto))
         return nullptr;
 
     if (!DefinePropertiesAndFunctions(cx, proto, nullptr, string_methods) ||
         !DefinePropertiesAndFunctions(cx, ctor, nullptr, string_static_methods))
     {
         return nullptr;
     }
 
     /*
      * Define escape/unescape, the URI encode/decode functions, and maybe
      * uneval on the global object.
      */
     if (!JS_DefineFunctions(cx, global, string_functions))
         return nullptr;
 
+    if (!GlobalObject::initBuiltinConstructor(cx, global, JSProto_String, ctor, proto))
+        return nullptr;
+
     return proto;
 }
 
 const char*
 js::ValueToPrintable(JSContext* cx, const Value& vArg, JSAutoByteString* bytes, bool asSource)
 {
     RootedValue v(cx, vArg);
     JSString* str;