Allow enum entries in double colon LHS with LV = 1.0

#KT-16782 Fixed

compiler/frontend/src/org/jetbrains/kotlin/resolve/QualifiedExpressionResolver.kt

@@ -25,6 +25,7 @@ import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.codeFragmentUtil.suppressDiagnosticsInDebugMode
+import org.jetbrains.kotlin.psi.psiUtil.getTopmostParentQualifiedExpressionForSelector
 import org.jetbrains.kotlin.resolve.calls.CallExpressionElement
 import org.jetbrains.kotlin.resolve.calls.unrollToLeftMostQualifiedExpression
 import org.jetbrains.kotlin.resolve.descriptorUtil.module
@@ -119,7 +120,10 @@ class QualifiedExpressionResolver {
 
     private fun checkNotEnumEntry(descriptor: DeclarationDescriptor?, trace: BindingTrace, expression: KtSimpleNameExpression) {
         if (descriptor != null && DescriptorUtils.isEnumEntry(descriptor)) {
-            trace.report(Errors.ENUM_ENTRY_AS_TYPE.on(expression))
+            val qualifiedParent = expression.getTopmostParentQualifiedExpressionForSelector()
+            if (qualifiedParent == null || qualifiedParent.parent !is KtDoubleColonExpression) {
+                trace.report(Errors.ENUM_ENTRY_AS_TYPE.on(expression))
+            }
         }
     }
 

compiler/frontend/src/org/jetbrains/kotlin/types/expressions/DoubleColonExpressionResolver.kt

@@ -423,7 +423,9 @@ class DoubleColonExpressionResolver(
                 val classDescriptor = resultingDescriptor.classDescriptor
                 if (classDescriptor.companionObjectDescriptor != null) return null
 
-                if (DescriptorUtils.isObject(classDescriptor)) {
+                if (DescriptorUtils.isObject(classDescriptor) ||
+                    (!languageVersionSettings.supportsFeature(LanguageFeature.BoundCallableReferences) &&
+                     DescriptorUtils.isEnumEntry(classDescriptor))) {
                     return DoubleColonLHS.Expression(typeInfo, isObjectQualifier = true)
                 }
             }