Test for IllegalArgumentException bug from JVM backend (KT-6149)

JVM backend fails with IllegalArgumentException: Argument for @NotNull parameter 'descriptor' of org/jetbrains/jet/codegen/PropertyCodegen.gen must not be null

 #KT-6149 Fixed

compiler/testData/diagnostics/tests/j+k/InnerClassFromJava.kt

@@ -0,0 +1,16 @@
+// FILE: Bar.java
+public class Bar implements Foo {
+public interface I extends Boo {
+}
+}
+
+// FILE: Baz.kt
+public trait Foo {
+    class object {
+        public val EMPTY: Foo = object : Foo{}
+    }
+}
+
+trait Boo
+
+public class Baz : Bar.I

compiler/testData/diagnostics/tests/j+k/InnerClassFromJava.txt

@@ -0,0 +1,41 @@
+package
+
+public open class Bar : Foo {
+    public constructor Bar()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public trait I : Boo {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}
+
+public final class Baz : Bar.I {
+    public constructor Baz()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+internal trait Boo {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public trait Foo {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+
+    public class object <class-object-for-Foo> {
+        private constructor <class-object-for-Foo>()
+        public final val EMPTY: Foo
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}