Fixes IRJSTranslator emitting internal variables twice for $receiver

src/Compiler-IR.js

@@ -3053,7 +3053,7 @@ $7=_st($8)._notEmpty();
 if(smalltalk.assert($7)){
 $9=self._stream();
 $ctx4.sendIdx["stream"]=6;
-_st($9)._nextPutVars_(_st(_st(_st(anIRMethod)._internalVariables())._asArray())._collect_((function(each){
+_st($9)._nextPutVars_(_st(_st(_st(anIRMethod)._internalVariables())._asSet())._collect_((function(each){
 return smalltalk.withContext(function($ctx5) {
 return _st(_st(each)._variable())._alias();
 }, function($ctx5) {$ctx5.fillBlock({each:each},$ctx4,7)})})));
@@ -3073,8 +3073,8 @@ return globals.IRJSTranslator.superclass.fn.prototype._visitIRMethod_.apply(_st(
 }, function($ctx2) {$ctx2.fillBlock({},$ctx1,1)})}));
 return self}, function($ctx1) {$ctx1.fill(self,"visitIRMethod:",{anIRMethod:anIRMethod},globals.IRJSTranslator)})},
 args: ["anIRMethod"],
-source: "visitIRMethod: anIRMethod\x0a\x0a\x09self stream\x0a\x09\x09nextPutMethodDeclaration: anIRMethod\x0a\x09\x09with: [ self stream\x0a\x09\x09\x09nextPutFunctionWith: [\x0a\x09\x09\x09\x09self stream nextPutVars: (anIRMethod tempDeclarations collect: [ :each |\x0a\x09\x09\x09\x09\x09each name asVariableName ]).\x0a\x09\x09\x09\x09anIRMethod classReferences do: [ :each | self stream nextPutClassRefFunction: each ].\x0a\x09\x09\x09\x09self stream nextPutContextFor: anIRMethod during: [\x0a\x09\x09\x09\x09anIRMethod internalVariables notEmpty ifTrue: [\x0a\x09\x09\x09\x09\x09self stream nextPutVars: (anIRMethod internalVariables asArray collect: [ :each |\x0a\x09\x09\x09\x09\x09\x09each variable alias ]) ].\x0a\x09\x09\x09\x09anIRMethod scope hasNonLocalReturn\x0a\x09\x09\x09\x09\x09ifTrue: [\x0a\x09\x09\x09\x09\x09\x09self stream nextPutNonLocalReturnHandlingWith: [\x0a\x09\x09\x09\x09\x09\x09\x09super visitIRMethod: anIRMethod ] ]\x0a\x09\x09\x09\x09\x09ifFalse: [ super visitIRMethod: anIRMethod ] ]]\x0a\x09\x09\x09arguments: anIRMethod arguments ]",
+source: "visitIRMethod: anIRMethod\x0a\x0a\x09self stream\x0a\x09\x09nextPutMethodDeclaration: anIRMethod\x0a\x09\x09with: [ self stream\x0a\x09\x09\x09nextPutFunctionWith: [\x0a\x09\x09\x09\x09self stream nextPutVars: (anIRMethod tempDeclarations collect: [ :each |\x0a\x09\x09\x09\x09\x09each name asVariableName ]).\x0a\x09\x09\x09\x09anIRMethod classReferences do: [ :each | self stream nextPutClassRefFunction: each ].\x0a\x09\x09\x09\x09self stream nextPutContextFor: anIRMethod during: [\x0a\x09\x09\x09\x09anIRMethod internalVariables notEmpty ifTrue: [\x0a\x09\x09\x09\x09\x09self stream nextPutVars: (anIRMethod internalVariables asSet collect: [ :each |\x0a\x09\x09\x09\x09\x09\x09each variable alias ]) ].\x0a\x09\x09\x09\x09anIRMethod scope hasNonLocalReturn\x0a\x09\x09\x09\x09\x09ifTrue: [\x0a\x09\x09\x09\x09\x09\x09self stream nextPutNonLocalReturnHandlingWith: [\x0a\x09\x09\x09\x09\x09\x09\x09super visitIRMethod: anIRMethod ] ]\x0a\x09\x09\x09\x09\x09ifFalse: [ super visitIRMethod: anIRMethod ] ]]\x0a\x09\x09\x09arguments: anIRMethod arguments ]",
-messageSends: ["nextPutMethodDeclaration:with:", "stream", "nextPutFunctionWith:arguments:", "nextPutVars:", "collect:", "tempDeclarations", "asVariableName", "name", "do:", "classReferences", "nextPutClassRefFunction:", "nextPutContextFor:during:", "ifTrue:", "notEmpty", "internalVariables", "asArray", "alias", "variable", "ifTrue:ifFalse:", "hasNonLocalReturn", "scope", "nextPutNonLocalReturnHandlingWith:", "visitIRMethod:", "arguments"],
+messageSends: ["nextPutMethodDeclaration:with:", "stream", "nextPutFunctionWith:arguments:", "nextPutVars:", "collect:", "tempDeclarations", "asVariableName", "name", "do:", "classReferences", "nextPutClassRefFunction:", "nextPutContextFor:during:", "ifTrue:", "notEmpty", "internalVariables", "asSet", "alias", "variable", "ifTrue:ifFalse:", "hasNonLocalReturn", "scope", "nextPutNonLocalReturnHandlingWith:", "visitIRMethod:", "arguments"],
 referencedClasses: []
 }),
 globals.IRJSTranslator);

src/Compiler-IR.st

@@ -981,7 +981,7 @@ visitIRMethod: anIRMethod
 				anIRMethod classReferences do: [ :each | self stream nextPutClassRefFunction: each ].
 				self stream nextPutContextFor: anIRMethod during: [
 				anIRMethod internalVariables notEmpty ifTrue: [
-					self stream nextPutVars: (anIRMethod internalVariables asArray collect: [ :each |
+					self stream nextPutVars: (anIRMethod internalVariables asSet collect: [ :each |
 						each variable alias ]) ].
 				anIRMethod scope hasNonLocalReturn
 					ifTrue: [