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Editorial: Fix 2 old bugs re Block-Level Function Declarations #2951

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Jun 23, 2023
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Editorial: Fix 2 old bugs re Block-Level Function Declarations #2951

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4 changes: 2 additions & 2 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -28856,7 +28856,6 @@ <h1>
1. If _fnDefinable_ is *false*, throw a *TypeError* exception.
1. Append _fn_ to _declaredFunctionNames_.
1. Insert _d_ as the first element of _functionsToInitialize_.
1. [id="step-evaldeclarationinstantiation-web-compat-insertion-point"] NOTE: Annex <emu-xref href="#sec-web-compat-evaldeclarationinstantiation"></emu-xref> adds additional steps at this point.
1. Let _declaredVarNames_ be a new empty List.
1. For each element _d_ of _varDeclarations_, do
1. If _d_ is either a |VariableDeclaration|, a |ForBinding|, or a |BindingIdentifier|, then
Expand All @@ -28867,6 +28866,7 @@ <h1>
1. If _vnDefinable_ is *false*, throw a *TypeError* exception.
1. If _declaredVarNames_ does not contain _vn_, then
1. Append _vn_ to _declaredVarNames_.
1. [id="step-evaldeclarationinstantiation-web-compat-insertion-point"] NOTE: Annex <emu-xref href="#sec-web-compat-evaldeclarationinstantiation"></emu-xref> adds additional steps at this point.
1. [id="step-evaldeclarationinstantiation-post-validation"] NOTE: No abnormal terminations occur after this algorithm step unless _varEnv_ is a Global Environment Record and the global object is a Proxy exotic object.
1. Let _lexDeclarations_ be the LexicallyScopedDeclarations of _body_.
1. For each element _d_ of _lexDeclarations_, do
Expand Down Expand Up @@ -49444,7 +49444,7 @@ <h1>Changes to FunctionDeclarationInstantiation</h1>
1. Let _F_ be StringValue of the |BindingIdentifier| of _f_.
1. If replacing the |FunctionDeclaration| _f_ with a |VariableStatement| that has _F_ as a |BindingIdentifier| would not produce any Early Errors for _func_ and _parameterNames_ does not contain _F_, then
1. NOTE: A var binding for _F_ is only instantiated here if it is neither a VarDeclaredName, the name of a formal parameter, or another |FunctionDeclaration|.
1. If _initializedBindings_ does not contain _F_ and _F_ is not *"arguments"*, then
1. If _instantiatedVarNames_ does not contain _F_ and _F_ is not *"arguments"*, then
1. Perform ! _varEnv_.CreateMutableBinding(_F_, *false*).
1. Perform ! _varEnv_.InitializeBinding(_F_, *undefined*).
1. Append _F_ to _instantiatedVarNames_.
Expand Down