Normative: Don't apply early error rules for ObjectLiteral when initi…

…ally parsing a CoverCallExpressionAndAsyncArrowHead

This needed to support `async({a = 0}) => {}` and `async({__proto__: a, __proto__: b}) => {}`.

spec.html

@@ -11329,7 +11329,7 @@ <h1>Static Semantics: Early Errors</h1>
             It is a Syntax Error if HasDirectSuper of |MethodDefinition| is *true*.
           </li>
         </ul>
-        <p>In addition to describing an actual object initializer the |ObjectLiteral| productions are also used as a cover grammar for |ObjectAssignmentPattern| and may be recognized as part of a |CoverParenthesizedExpressionAndArrowParameterList|. When |ObjectLiteral| appears in a context where |ObjectAssignmentPattern| is required the following Early Error rules are <b>not</b> applied. In addition, they are not applied when initially parsing a |CoverParenthesizedExpressionAndArrowParameterList|.</p>
+        <p>In addition to describing an actual object initializer the |ObjectLiteral| productions are also used as a cover grammar for |ObjectAssignmentPattern| and may be recognized as part of a |CoverParenthesizedExpressionAndArrowParameterList|. When |ObjectLiteral| appears in a context where |ObjectAssignmentPattern| is required the following Early Error rules are <b>not</b> applied. In addition, they are not applied when initially parsing a |CoverParenthesizedExpressionAndArrowParameterList| or |CoverCallExpressionAndAsyncArrowHead|.</p>
         <emu-grammar>PropertyDefinition : CoverInitializedName</emu-grammar>
         <ul>
           <li>
@@ -38609,7 +38609,7 @@ <h1>Other Additional Features</h1>
     <!-- es6num="B.3.1" -->
     <emu-annex id="sec-__proto__-property-names-in-object-initializers">
       <h1>__proto__ Property Names in Object Initializers</h1>
-      <p>The following Early Error rule is added to those in <emu-xref href="#sec-object-initializer-static-semantics-early-errors"></emu-xref>. When |ObjectLiteral| appears in a context where |ObjectAssignmentPattern| is required the Early Error rule is <b>not</b> applied. In addition, it is not applied when initially parsing a |CoverParenthesizedExpressionAndArrowParameterList|.</p>
+      <p>The following Early Error rule is added to those in <emu-xref href="#sec-object-initializer-static-semantics-early-errors"></emu-xref>. When |ObjectLiteral| appears in a context where |ObjectAssignmentPattern| is required the Early Error rule is <b>not</b> applied. In addition, it is not applied when initially parsing a |CoverParenthesizedExpressionAndArrowParameterList| or a |CoverCallExpressionAndAsyncArrowHead|.</p>
       <emu-grammar>
         ObjectLiteral : `{` PropertyDefinitionList `}`