2.1.15 [ECMA-ES2017] Section 13.7.5.1 Static Semantics: Early Errors

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V0129: It is not a Syntax Error if an element of the BoundNames of ForDeclaration also occurs in the VarDeclaredNames of Statement

The specification states:

 13.7.5.1 Static Semantics: Early Errors
     ...
             IterationStatement :
                 for ( ForDeclaration in Expression ) Statement
                 for ( ForDeclaration of AssignmentExpression ) Statement
                 ...
  
         • It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
         • It is a Syntax Error if any element of the BoundNames of ForDeclaration also 
         occurs in the VarDeclaredNames of Statement.
         • It is a Syntax Error if the BoundNames of ForDeclaration contains any duplicate 
         entries.

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It is not a Syntax Error if an element of the BoundNames of ForDeclaration also occurs in the VarDeclaredNames of Statement.