Don't generate delegation to java default methods

#KT-15226  Fixed

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/JvmDelegationFilter.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.resolve.jvm
+
+import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.Modality
+import org.jetbrains.kotlin.load.java.descriptors.JavaMethodDescriptor
+import org.jetbrains.kotlin.resolve.DescriptorUtils
+import org.jetbrains.kotlin.resolve.lazy.DelegationFilter
+
+object JvmDelegationFilter : DelegationFilter {
+
+    override fun filter(interfaceMember: CallableMemberDescriptor): Boolean {
+        //We always have only one implementation otherwise it's an error in kotlin and java
+        return !isJavaDefaultMethod(DescriptorUtils.unwrapFakeOverride(interfaceMember))
+    }
+
+    private fun isJavaDefaultMethod(interfaceMember: CallableMemberDescriptor): Boolean {
+        return interfaceMember is JavaMethodDescriptor && interfaceMember.modality != Modality.ABSTRACT
+    }
+}

compiler/frontend.java/src/org/jetbrains/kotlin/resolve/jvm/platform/JvmPlatformConfigurator.kt

@@ -24,10 +24,12 @@ import org.jetbrains.kotlin.resolve.PlatformConfigurator
 import org.jetbrains.kotlin.resolve.calls.checkers.ReifiedTypeParameterSubstitutionChecker
 import org.jetbrains.kotlin.resolve.checkers.MissingDependencyClassChecker
 import org.jetbrains.kotlin.resolve.checkers.HeaderImplDeclarationChecker
+import org.jetbrains.kotlin.resolve.jvm.JvmDelegationFilter
 import org.jetbrains.kotlin.resolve.jvm.JvmOverloadFilter
 import org.jetbrains.kotlin.resolve.jvm.JvmTypeSpecificityComparator
 import org.jetbrains.kotlin.resolve.jvm.RuntimeAssertionsTypeChecker
 import org.jetbrains.kotlin.resolve.jvm.checkers.*
+import org.jetbrains.kotlin.resolve.lazy.DelegationFilter
 import org.jetbrains.kotlin.synthetic.JavaSyntheticConstructorsProvider
 import org.jetbrains.kotlin.synthetic.JavaSyntheticScopes
 import org.jetbrains.kotlin.types.DynamicTypesSettings
@@ -82,7 +84,9 @@ object JvmPlatformConfigurator : PlatformConfigurator(
 
         overloadFilter = JvmOverloadFilter,
 
-        platformToKotlinClassMap = JavaToKotlinClassMap.INSTANCE
+        platformToKotlinClassMap = JavaToKotlinClassMap.INSTANCE,
+
+        delegationFilter = JvmDelegationFilter
 ) {
     override fun configureModuleComponents(container: StorageComponentContainer) {
         container.useImpl<JvmReflectionAPICallChecker>()