update

spec.html

@@ -8688,6 +8688,8 @@ <h1>SetFunctionName ( _F_, _name_ [ , _prefix_ ] )</h1>
           1. Set _F_.[[InitialName]] to _name_.
         1. If _prefix_ is present, then
           1. Set _name_ to the string-concatenation of _prefix_, the code unit 0x0020 (SPACE), and _name_.
+        1. If _F_ has an [[InitialName]] internal slot, then
+          1. Optionally, set _F_.[[InitialName]] to _name_.
         1. Return ! DefinePropertyOrThrow(_F_, *"name"*, PropertyDescriptor { [[Value]]: _name_, [[Writable]]: *false*, [[Enumerable]]: *false*, [[Configurable]]: *true* }).
       </emu-alg>
     </emu-clause>
@@ -26473,7 +26475,7 @@ <h1>Function.prototype.toString ( )</h1>
         <p>When the `toString` method is called, the following steps are taken:</p>
         <emu-alg>
           1. Let _func_ be the *this* value.
-          1. If _func_ is a <emu-xref href="#sec-bound-function-exotic-objects">bound function exotic object</emu-xref> or a <emu-xref href="#sec-built-in-function-objects">built-in function object</emu-xref>, then return an implementation-defined String source code representation of _func_. The representation must have the syntax of a |NativeFunction|. Additionally, if _func_ has an [[InitialName]] internal slot and _func_.[[InitialName]] is a String, the portion of the returned String that would be matched by |PropertyName| must be the value of _func_.[[InitialName]].
+          1. If _func_ is a <emu-xref href="#sec-bound-function-exotic-objects">bound function exotic object</emu-xref> or a <emu-xref href="#sec-built-in-function-objects">built-in function object</emu-xref>, then return an implementation-defined String source code representation of _func_. The representation must have the syntax of a |NativeFunction|. Additionally, if _func_ has an [[InitialName]] internal slot and _func_.[[InitialName]] is a String, the portion of the returned String that would be matched by |NativeFunctionAccessor?| |PropertyName| must be the value of _func_.[[InitialName]].
           1. If Type(_func_) is Object and _func_ has a [[SourceText]] internal slot and _func_.[[SourceText]] is a sequence of Unicode code points and ! HostHasSourceTextAvailable(_func_) is *true*, then
             1. Return ! UTF16Encode(_func_.[[SourceText]]).
           1. If Type(_func_) is Object and IsCallable(_func_) is *true*, then return an implementation-defined String source code representation of _func_. The representation must have the syntax of a |NativeFunction|.
@@ -26482,7 +26484,10 @@ <h1>Function.prototype.toString ( )</h1>
 
         <emu-grammar type="definition">
           NativeFunction :
-            `function` PropertyName[~Yield, ~Await]? `(` FormalParameters[~Yield, ~Await] `)` `{` `[` `native` `code` `]` `}`
+            `function` NativeFunctionAccessor? PropertyName[~Yield, ~Await]? `(` FormalParameters[~Yield, ~Await] `)` `{` `[` `native` `code` `]` `}`
+          NativeFunctionAccessor :
+            `get`
+            `set`
         </emu-grammar>
       </emu-clause>