diff --git a/core/reflection.jvm/src/kotlin/reflect/KClasses.kt b/core/reflection.jvm/src/kotlin/reflect/KClasses.kt
index 7abad005ccd..4077d46f404 100644
--- a/core/reflection.jvm/src/kotlin/reflect/KClasses.kt
+++ b/core/reflection.jvm/src/kotlin/reflect/KClasses.kt
@@ -21,6 +21,7 @@ import org.jetbrains.kotlin.descriptors.ConstructorDescriptor
 import org.jetbrains.kotlin.types.TypeSubstitutor
 import org.jetbrains.kotlin.types.Variance
 import org.jetbrains.kotlin.utils.DFS
+import kotlin.reflect.jvm.internal.KCallableImpl
 import kotlin.reflect.jvm.internal.KClassImpl
 import kotlin.reflect.jvm.internal.KFunctionImpl
 import kotlin.reflect.jvm.internal.KTypeImpl
@@ -70,8 +71,8 @@ val KClass<*>.defaultType: KType
  */
 val KClass<*>.declaredMembers: Collection<KCallable<*>>
     get() = with(this as KClassImpl) {
-        (getMembers(memberScope, declaredOnly = true, nonExtensions = true, extensions = true) +
-         getMembers(staticScope, declaredOnly = true, nonExtensions = true, extensions = true)).toList()
+        (getMembers(memberScope, declaredOnly = true) +
+         getMembers(staticScope, declaredOnly = true)).toList()
     }
 
 /**
@@ -86,7 +87,7 @@ val KClass<*>.functions: Collection<KFunction<*>>
  */
 val KClass<*>.staticFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(staticScope, declaredOnly = false, nonExtensions = true, extensions = true)
+            .getMembers(staticScope, declaredOnly = false)
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -95,7 +96,8 @@ val KClass<*>.staticFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.memberFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(memberScope, declaredOnly = false, nonExtensions = true, extensions = false)
+            .getMembers(memberScope, declaredOnly = false)
+            .filterNotExtensions()
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -104,7 +106,8 @@ val KClass<*>.memberFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.memberExtensionFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(memberScope, declaredOnly = false, nonExtensions = false, extensions = true)
+            .getMembers(memberScope, declaredOnly = false)
+            .filterExtensions()
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -115,8 +118,8 @@ val KClass<*>.memberExtensionFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.declaredFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(memberScope, declaredOnly = true, nonExtensions = true, extensions = true)
-            .plus(getMembers(staticScope, declaredOnly = true, nonExtensions = true, extensions = true))
+            .getMembers(memberScope, declaredOnly = true)
+            .plus(getMembers(staticScope, declaredOnly = true))
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -125,7 +128,8 @@ val KClass<*>.declaredFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.declaredMemberFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(memberScope, declaredOnly = true, nonExtensions = true, extensions = false)
+            .getMembers(memberScope, declaredOnly = true)
+            .filterNotExtensions()
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -134,7 +138,8 @@ val KClass<*>.declaredMemberFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.declaredMemberExtensionFunctions: Collection<KFunction<*>>
     get() = (this as KClassImpl)
-            .getMembers(memberScope, declaredOnly = true, nonExtensions = false, extensions = true)
+            .getMembers(memberScope, declaredOnly = true)
+            .filterExtensions()
             .filterIsInstance<KFunction<*>>()
             .toList()
 
@@ -144,7 +149,8 @@ val KClass<*>.declaredMemberExtensionFunctions: Collection<KFunction<*>>
  */
 val KClass<*>.staticProperties: Collection<KProperty0<*>>
     get() = (this as KClassImpl)
-            .getMembers(staticScope, declaredOnly = false, nonExtensions = true, extensions = false)
+            .getMembers(staticScope, declaredOnly = false)
+            .filterNotExtensions()
             .filterIsInstance<KProperty0<*>>()
             .toList()
 
@@ -153,7 +159,8 @@ val KClass<*>.staticProperties: Collection<KProperty0<*>>
  */
 val <T : Any> KClass<T>.memberProperties: Collection<KProperty1<T, *>>
     get() = (this as KClassImpl<T>)
-            .getMembers(memberScope, declaredOnly = false, nonExtensions = true, extensions = false)
+            .getMembers(memberScope, declaredOnly = false)
+            .filterNotExtensions()
             .filterIsInstance<KProperty1<T, *>>()
             .toList()
 
@@ -162,7 +169,8 @@ val <T : Any> KClass<T>.memberProperties: Collection<KProperty1<T, *>>
  */
 val <T : Any> KClass<T>.memberExtensionProperties: Collection<KProperty2<T, *, *>>
     get() = (this as KClassImpl<T>)
-            .getMembers(memberScope, declaredOnly = false, nonExtensions = false, extensions = true)
+            .getMembers(memberScope, declaredOnly = false)
+            .filterExtensions()
             .filterIsInstance<KProperty2<T, *, *>>()
             .toList()
 
@@ -171,7 +179,8 @@ val <T : Any> KClass<T>.memberExtensionProperties: Collection<KProperty2<T, *, *
  */
 val <T : Any> KClass<T>.declaredMemberProperties: Collection<KProperty1<T, *>>
     get() = (this as KClassImpl<T>)
-            .getMembers(memberScope, declaredOnly = true, nonExtensions = true, extensions = false)
+            .getMembers(memberScope, declaredOnly = true)
+            .filterNotExtensions()
             .filterIsInstance<KProperty1<T, *>>()
             .toList()
 
@@ -180,11 +189,18 @@ val <T : Any> KClass<T>.declaredMemberProperties: Collection<KProperty1<T, *>>
  */
 val <T : Any> KClass<T>.declaredMemberExtensionProperties: Collection<KProperty2<T, *, *>>
     get() = (this as KClassImpl<T>)
-            .getMembers(memberScope, declaredOnly = true, nonExtensions = false, extensions = true)
+            .getMembers(memberScope, declaredOnly = true)
+            .filterExtensions()
             .filterIsInstance<KProperty2<T, *, *>>()
             .toList()
 
 
+private fun <T : KCallableImpl<*>> Sequence<T>.filterExtensions(): Sequence<T> =
+        filter { it.descriptor.extensionReceiverParameter != null }
+
+private fun <T : KCallableImpl<*>> Sequence<T>.filterNotExtensions(): Sequence<T> =
+        filter { it.descriptor.extensionReceiverParameter == null }
+
 /**
  * Immediate superclasses of this class, in the order they are listed in the source code.
  * Includes superclasses and superinterfaces of the class, but does not include the class itself.
diff --git a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt
index df51b973ad4..99a0c20c1ee 100644
--- a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt
+++ b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KClassImpl.kt
@@ -75,9 +75,7 @@ internal class KClassImpl<T : Any>(override val jClass: Class<T>) :
     internal val staticScope: MemberScope get() = descriptor.staticScope
 
     override val members: Collection<KCallable<*>>
-        get() = getMembers(memberScope, declaredOnly = false, nonExtensions = true, extensions = true)
-                .plus(getMembers(staticScope, declaredOnly = false, nonExtensions = true, extensions = true))
-                .toList()
+        get() = (getMembers(memberScope, declaredOnly = false) + getMembers(staticScope, declaredOnly = false)).toList()
 
     override val constructorDescriptors: Collection<ConstructorDescriptor>
         get() {
diff --git a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt
index e2ec95a015a..1a47c29cd71 100644
--- a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt
+++ b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KDeclarationContainerImpl.kt
@@ -47,17 +47,10 @@ internal abstract class KDeclarationContainerImpl : ClassBasedDeclarationContain
 
     abstract fun getFunctions(name: Name): Collection<FunctionDescriptor>
 
-    fun getMembers(scope: MemberScope, declaredOnly: Boolean, nonExtensions: Boolean, extensions: Boolean): Sequence<KCallableImpl<*>> {
+    fun getMembers(scope: MemberScope, declaredOnly: Boolean): Sequence<KCallableImpl<*>> {
         val visitor = object : DeclarationDescriptorVisitorEmptyBodies<KCallableImpl<*>?, Unit>() {
-            private fun skipCallable(descriptor: CallableMemberDescriptor): Boolean {
-                if (declaredOnly && !descriptor.kind.isReal) return true
-
-                val isExtension = descriptor.extensionReceiverParameter != null
-                if (isExtension && !extensions) return true
-                if (!isExtension && !nonExtensions) return true
-
-                return false
-            }
+            private fun skipCallable(descriptor: CallableMemberDescriptor): Boolean =
+                    declaredOnly && !descriptor.kind.isReal
 
             override fun visitPropertyDescriptor(descriptor: PropertyDescriptor, data: Unit): KCallableImpl<*>? {
                 return if (skipCallable(descriptor)) null else createProperty(descriptor)
diff --git a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KPackageImpl.kt b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KPackageImpl.kt
index 827180528ae..e64b5784d52 100644
--- a/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KPackageImpl.kt
+++ b/core/reflection.jvm/src/kotlin/reflect/jvm/internal/KPackageImpl.kt
@@ -57,7 +57,7 @@ internal class KPackageImpl(override val jClass: Class<*>, val moduleName: Strin
     private val scope: MemberScope get() = data().descriptor.memberScope
 
     override val members: Collection<KCallable<*>>
-        get() = getMembers(scope, declaredOnly = false, nonExtensions = true, extensions = true).filter { member ->
+        get() = getMembers(scope, declaredOnly = false).filter { member ->
             val callableDescriptor = member.descriptor as DeserializedCallableMemberDescriptor
             val packageFragment = callableDescriptor.containingDeclaration as PackageFragmentDescriptor
             val source = (packageFragment as? LazyJavaPackageFragment)?.source as? KotlinJvmBinaryPackageSourceElement