Signature comparison used to find super functions in SignaturesPropagationData

#KT-4509 Fixed

compiler/testData/loadJava/compiledJavaIncludeObjectMethods/ClassWithObjectMethod.txt

@@ -9,7 +9,7 @@ public final class ClassWithObjectMethod : java.lang.Object {
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final override /*1*/ /*fake_override*/ fun notify(): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun notifyAll(): kotlin.Unit
-    public open override /*1*/ fun toString(): kotlin.String?
+    public open override /*1*/ fun toString(): kotlin.String
     public final override /*1*/ /*fake_override*/ fun wait(): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun wait(/*0*/ p0: kotlin.Long): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun wait(/*0*/ p0: kotlin.Long, /*1*/ p1: kotlin.Int): kotlin.Unit

compiler/testData/loadJava/compiledJavaIncludeObjectMethods/InterfaceWithObjectMethods.txt

@@ -1,14 +1,14 @@
 package test
 
 public trait InterfaceWithObjectMethods : java.lang.Object {
-    public abstract override /*1*/ fun clone(): kotlin.Any?
+    public abstract override /*1*/ fun clone(): kotlin.Any
     public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
     public abstract override /*1*/ fun finalize(): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun getClass(): java.lang.Class<out kotlin.Any?>
     public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
     public final override /*1*/ /*fake_override*/ fun notify(): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun notifyAll(): kotlin.Unit
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String?
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
     public final override /*1*/ /*fake_override*/ fun wait(): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun wait(/*0*/ p0: kotlin.Long): kotlin.Unit
     public final override /*1*/ /*fake_override*/ fun wait(/*0*/ p0: kotlin.Long, /*1*/ p1: kotlin.Int): kotlin.Unit

compiler/testData/loadJava/kotlinAgainstCompiledJavaWithKotlin/propagationAgainstDeserializedSuperclass.kt

@@ -0,0 +1,5 @@
+package test
+
+class K1 : J() {
+    override fun foo(l: MutableList<String>): String
+}

compiler/testData/loadJava/kotlinAgainstCompiledJavaWithKotlin/propagationAgainstDeserializedSuperclass.txt

@@ -0,0 +1,15 @@
+package test
+
+public open class J : test.K {
+    public constructor J()
+    public open override /*1*/ fun foo(/*0*/ l: kotlin.MutableList<kotlin.String>): kotlin.String
+}
+
+internal trait K {
+    public abstract fun foo(/*0*/ l: kotlin.MutableList<kotlin.String>): kotlin.String
+}
+
+internal final class K1 : test.J {
+    public constructor K1()
+    public open override /*1*/ fun foo(/*0*/ l: kotlin.MutableList<kotlin.String>): kotlin.String
+}

compiler/testData/loadJava/kotlinAgainstCompiledJavaWithKotlin/propagationAgainstDeserializedSuperclass/J.java

@@ -0,0 +1,9 @@
+package test;
+
+import java.util.List;
+
+public class J implements K {
+    public String foo(List<String> bar) {
+        return "";
+    }
+}

compiler/testData/loadJava/kotlinAgainstCompiledJavaWithKotlin/propagationAgainstDeserializedSuperclass/K.kt

@@ -0,0 +1,5 @@
+package test
+
+trait K {
+    public fun foo(l: MutableList<String>): String
+}