Add overload to comply with the contract

Method getVariableNames() should return all variable names, but in the
inherited implementation it doesn't return resX names which represent
result fields.

plugins/scripting/scripting-compiler-impl/src/org/jetbrains/kotlin/scripting/resolve/LazyScriptClassMemberScope.kt

@@ -25,6 +25,15 @@ class LazyScriptClassMemberScope(
     trace: BindingTrace
 ) : LazyClassMemberScope(resolveSession, declarationProvider, scriptDescriptor, trace) {
 
+    private val _variableNames: MutableSet<Name>
+            by lazy(LazyThreadSafetyMode.PUBLICATION) {
+                super.getVariableNames().apply {
+                    scriptDescriptor.resultFieldName()?.let {
+                        add(it)
+                    }
+                }
+            }
+
     private val scriptPrimaryConstructor: () -> ClassConstructorDescriptorImpl? = resolveSession.storageManager.createNullableLazyValue {
         val baseClass = scriptDescriptor.baseClassDescriptor()
         val baseConstructorDescriptor = baseClass?.unsubstitutedPrimaryConstructor
@@ -82,9 +91,11 @@ class LazyScriptClassMemberScope(
         return constructor
     }
 
+    override fun getVariableNames() = _variableNames
+
     override fun getNonDeclaredProperties(name: Name, result: MutableSet<PropertyDescriptor>) {
         super.getNonDeclaredProperties(name, result)
-        if (scriptDescriptor.resultFieldName() == name.asString()) {
+        if (scriptDescriptor.resultFieldName() == name) {
             scriptDescriptor.resultValue?.let {
                 result.add(it)
             }

plugins/scripting/scripting-compiler-impl/src/org/jetbrains/kotlin/scripting/resolve/LazyScriptDescriptor.kt

@@ -83,7 +83,7 @@ class LazyScriptDescriptor(
         return if (type != null && !type.isUnit() && !type.isNothing()) {
             resultFieldName()?.let {
                 ReplResultPropertyDescriptor(
-                    Name.identifier(it),
+                    it,
                     type,
                     this.thisAsReceiverParameter,
                     this,
@@ -93,11 +93,11 @@ class LazyScriptDescriptor(
         } else null
     }
 
-    fun resultFieldName(): String? {
+    fun resultFieldName(): Name? {
         // TODO: implement robust REPL/script selection
         val replSnippetId =
             scriptInfo.script.getUserData(ScriptPriorities.PRIORITY_KEY)?.toString()
-        return if (replSnippetId != null) {
+        val identifier = if (replSnippetId != null) {
             // assuming repl
             scriptCompilationConfiguration()[ScriptCompilationConfiguration.repl.resultFieldPrefix]?.takeIf { it.isNotBlank() }?.let {
                 "$it$replSnippetId"
@@ -105,6 +105,7 @@ class LazyScriptDescriptor(
         } else {
             scriptCompilationConfiguration()[ScriptCompilationConfiguration.resultField]?.takeIf { it.isNotBlank() }
         }
+        return identifier?.let { Name.identifier(it) }
     }
 
     private val sourceElement = scriptInfo.script.toSourceElement()