Normative: Set function name and length in CreateBuiltinFunction

spec.html

@@ -7509,7 +7509,7 @@ <h1>CreateIntrinsics ( _realmRec_ )</h1>
       <emu-alg>
         1. Let _intrinsics_ be a new Record.
         1. Set _realmRec_.[[Intrinsics]] to _intrinsics_.
-        1. Set fields of _intrinsics_ with the values listed in <emu-xref href="#table-7"></emu-xref>. The field names are the names listed in column one of the table. The value of each field is a new object value fully and recursively populated with property values as defined by the specification of each object in clauses 18-26. All object property values are newly created object values. All values that are built-in function objects are created by performing CreateBuiltinFunction(&lt;steps&gt;, &lt;slots&gt;, _realmRec_, &lt;prototype&gt;) where &lt;steps&gt; is the definition of that function provided by this specification, &lt;slots&gt; is a list of the names, if any, of the function's specified internal slots, and &lt;prototype&gt; is the specified value of the function's [[Prototype]] internal slot. The creation of the intrinsics and their properties must be ordered to avoid any dependencies upon objects that have not yet been created.
+        1. Set fields of _intrinsics_ with the values listed in <emu-xref href="#table-7"></emu-xref>. The field names are the names listed in column one of the table. The value of each field is a new object value fully and recursively populated with property values as defined by the specification of each object in clauses 18-26. All object property values are newly created object values. All values that are built-in function objects are created by performing CreateBuiltinFunction(&lt;steps&gt;, &lt;slots&gt;, _realmRec_, &lt;prototype&gt;, &lt;name&gt;) where &lt;steps&gt; is the definition of that function provided by this specification, &lt;slots&gt; is a list of the names, if any, of the function's specified internal slots, &lt;prototype&gt; is the specified value of the function's [[Prototype]] internal slot, and &lt;name&gt; is the initial value of the function's `name` property. The creation of the intrinsics and their properties must be ordered to avoid any dependencies upon objects that have not yet been created.
         1. Perform AddRestrictedFunctionProperties(_intrinsics_.[[%Function.prototype%]], _realmRec_).
         1. Return _intrinsics_.
       </emu-alg>
@@ -8871,8 +8871,8 @@ <h1>[[Construct]] ( _argumentsList_, _newTarget_ )</h1>
     </emu-clause>
 
     <emu-clause id="sec-createbuiltinfunction" aoid="CreateBuiltinFunction">
-      <h1>CreateBuiltinFunction ( _steps_, _internalSlotsList_ [ , _realm_ [ , _prototype_ ] ] )</h1>
-      <p>The abstract operation CreateBuiltinFunction takes arguments _steps_ and _internalSlotsList_ (a List of names of internal slots) and optional arguments _realm_ and _prototype_. _internalSlotsList_ contains the names of additional internal slots that must be defined as part of the object. This operation creates a built-in function object. It performs the following steps when called:</p>
+      <h1>CreateBuiltinFunction ( _steps_, _internalSlotsList_ [ , _realm_ [ , _prototype_ [ , _name_ ] ] ] )</h1>
+      <p>The abstract operation CreateBuiltinFunction takes arguments _steps_ and _internalSlotsList_ (a List of names of internal slots) and optional arguments _realm_, _prototype_, and _name_. _internalSlotsList_ contains the names of additional internal slots that must be defined as part of the object. This operation creates a built-in function object. It performs the following steps when called:</p>
       <emu-alg>
         1. Assert: _steps_ is either a set of algorithm steps or other definition of a function's behaviour provided in this specification.
         1. If _realm_ is not present, set _realm_ to the current Realm Record.
@@ -8883,6 +8883,10 @@ <h1>CreateBuiltinFunction ( _steps_, _internalSlotsList_ [ , _realm_ [ , _protot
         1. Set _func_.[[Prototype]] to _prototype_.
         1. Set _func_.[[Extensible]] to *true*.
         1. Set _func_.[[ScriptOrModule]] to *null*.
+        1. Let _length_ be the number of parameters taken by _steps_.
+        1. Perform ! SetFunctionLength(_func_, _length_).
+        1. If _name_ is not present, set _name_ to the empty String.
+        1. Perform ! SetFunctionName(_func_, _name_).
         1. Return _func_.
       </emu-alg>
       <p>Each built-in function defined in this specification is created by calling the CreateBuiltinFunction abstract operation.</p>