| array-destructuring-param-strict-body.js | 
           | 
          6075 | 
        
        
          | browser.js | 
           | 
          0 | 
        
        
          | dflt-params-abrupt.js | 
          ---
description: Abrupt completion returned by evaluation of initializer (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    1. Let status be the result of performing IteratorBindingInitialization for
       FormalsList using iteratorRecord and environment as the arguments.
    2. ReturnIfAbrupt(status).
    3. Return the result of performing IteratorBindingInitialization for
       FormalParameter using iteratorRecord and environment as the arguments.
--- | 
          2824 | 
        
        
          | dflt-params-arg-val-not-undefined.js | 
          ---
description: Use of initializer when argument value is not `undefined` (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    [...]
    23. Let iteratorRecord be Record {[[Iterator]]:
        CreateListIterator(argumentsList), [[Done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        a. Perform ? IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
--- | 
          3708 | 
        
        
          | dflt-params-arg-val-undefined.js | 
          ---
description: Use of initializer when argument value is `undefined` (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    [...]
    23. Let iteratorRecord be Record {[[Iterator]]:
        CreateListIterator(argumentsList), [[Done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        a. Perform ? IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
--- | 
          2971 | 
        
        
          | dflt-params-duplicates.js | 
          ---
description: It is a Syntax Error if BoundNames of FormalParameters contains any duplicate elements. (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
negative:
  phase: parse
  type: SyntaxError
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.2 Static Semantics: Early Errors
    StrictFormalParameters : FormalParameters
    - It is a Syntax Error if BoundNames of FormalParameters contains any
      duplicate elements.
    FormalParameters : FormalParameterList
    - It is a Syntax Error if IsSimpleParameterList of FormalParameterList is
      false and BoundNames of FormalParameterList contains any duplicate
      elements.
--- | 
          2662 | 
        
        
          | dflt-params-ref-later.js | 
          ---
description: Referencing a parameter that occurs later in the ParameterList (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    1. Let status be the result of performing IteratorBindingInitialization for
       FormalsList using iteratorRecord and environment as the arguments.
    2. ReturnIfAbrupt(status).
    3. Return the result of performing IteratorBindingInitialization for
       FormalParameter using iteratorRecord and environment as the arguments.
--- | 
          2807 | 
        
        
          | dflt-params-ref-prior.js | 
          ---
description: Referencing a parameter that occurs earlier in the ParameterList (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    1. Let status be the result of performing IteratorBindingInitialization for
       FormalsList using iteratorRecord and environment as the arguments.
    2. ReturnIfAbrupt(status).
    3. Return the result of performing IteratorBindingInitialization for
       FormalParameter using iteratorRecord and environment as the arguments.
--- | 
          3004 | 
        
        
          | dflt-params-ref-self.js | 
          ---
description: Referencing a parameter from within its own initializer (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1.19 Runtime Semantics: IteratorBindingInitialization
    FormalsList : FormalsList , FormalParameter
    1. Let status be the result of performing IteratorBindingInitialization for
       FormalsList using iteratorRecord and environment as the arguments.
    2. ReturnIfAbrupt(status).
    3. Return the result of performing IteratorBindingInitialization for
       FormalParameter using iteratorRecord and environment as the arguments.
--- | 
          2796 | 
        
        
          | dflt-params-rest.js | 
          ---
description: RestParameter does not support an initializer (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
features: [default-parameters]
flags: [generated]
negative:
  phase: parse
  type: SyntaxError
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    14.1 Function Definitions
    Syntax
    FunctionRestParameter[Yield] :
      BindingRestElement[?Yield]
    13.3.3 Destructuring Binding Patterns
    Syntax
    BindingRestElement[Yield] :
      ...BindingIdentifier[?Yield]
      ...BindingPattern[?Yield]
--- | 
          2481 | 
        
        
          | dflt-params-trailing-comma.js | 
          ---
description: A trailing comma should not increase the respective length, using default parameters (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    Trailing comma in the parameters list
    14.1 Function Definitions
    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
--- | 
          2659 | 
        
        
          | forbidden-ext | 
           | 
           | 
        
        
          | object-destructuring-param-strict-body.js | 
           | 
          6078 | 
        
        
          | params-trailing-comma-multiple.js | 
          ---
description: A trailing comma should not increase the respective length, using multiple parameters (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    Trailing comma in the parameters list
    14.1 Function Definitions
    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
--- | 
          2652 | 
        
        
          | params-trailing-comma-single.js | 
          ---
description: A trailing comma should not increase the respective length, using a single parameter (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
flags: [generated]
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    Trailing comma in the parameters list
    14.1 Function Definitions
    FormalParameters[Yield, Await] : FormalParameterList[?Yield, ?Await] ,
--- | 
          2614 | 
        
        
          | rest-param-strict-body.js | 
           | 
          6084 | 
        
        
          | rest-params-trailing-comma-early-error.js | 
          ---
description: It's a syntax error if a FunctionRestParameter is followed by a trailing comma (class expression method)
esid: sec-class-definitions-runtime-semantics-evaluation
flags: [generated]
negative:
  phase: parse
  type: SyntaxError
info: |
    ClassExpression : class BindingIdentifieropt ClassTail
    1. If BindingIdentifieropt is not present, let className be undefined.
    2. Else, let className be StringValue of BindingIdentifier.
    3. Let value be the result of ClassDefinitionEvaluation of ClassTail
       with argument className.
    [...]
    14.5.14 Runtime Semantics: ClassDefinitionEvaluation
    21. For each ClassElement m in order from methods
        a. If IsStatic of m is false, then
           i. Let status be the result of performing
              PropertyDefinitionEvaluation for m with arguments proto and
              false.
        [...]
    14.3.8 Runtime Semantics: DefineMethod
    MethodDefinition : PropertyName ( StrictFormalParameters ) { FunctionBody }
    [...]
    6. Let closure be FunctionCreate(kind, StrictFormalParameters, FunctionBody,
       scope, strict). If functionPrototype was passed as a parameter then pass its
       value as the functionPrototype optional argument of FunctionCreate.
    [...]
    9.2.1 [[Call]] ( thisArgument, argumentsList)
    [...]
    7. Let result be OrdinaryCallEvaluateBody(F, argumentsList).
    [...]
    9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList )
    1. Let status be FunctionDeclarationInstantiation(F, argumentsList).
    [...]
    9.2.12 FunctionDeclarationInstantiation(func, argumentsList)
    [...]
    23. Let iteratorRecord be Record {[[iterator]]:
        CreateListIterator(argumentsList), [[done]]: false}.
    24. If hasDuplicates is true, then
        [...]
    25. Else,
        b. Let formalStatus be IteratorBindingInitialization for formals with
           iteratorRecord and env as arguments.
    [...]
    Trailing comma in the parameters list
    14.1 Function Definitions
    FormalParameters[Yield, Await] :
        [empty]
        FunctionRestParameter[?Yield, ?Await]
        FormalParameterList[?Yield, ?Await]
        FormalParameterList[?Yield, ?Await] ,
        FormalParameterList[?Yield, ?Await] , FunctionRestParameter[?Yield, ?Await]
--- | 
          2579 | 
        
        
          | shell.js | 
           | 
          0 |