Prohibit named parameters in function types in supertype position

compiler/testData/diagnostics/tests/DefaultValueForParameterInFunctionType.kt

@@ -10,7 +10,7 @@ fun inParamNested(fn1: (fn2: (n: Int = <!UNSUPPORTED!>0<!>)->Unit)->Unit) {}
 
 fun inReturn(): (x: Int = <!UNSUPPORTED!>0<!>)->Unit = {}
 
-class A : (x: Int = <!UNSUPPORTED!>0<!>)->Unit {
+class A : (Int)->Unit {
     override fun invoke(p1: Int) {
         var lambda: (x: Int = <!UNSUPPORTED!>0<!>)->Unit = {}
     }

compiler/testData/diagnostics/tests/NamedFunctionTypeParameterInSupertype.kt

@@ -0,0 +1,9 @@
+abstract class A : Function1<Any, Unit>
+
+abstract class B : (Int)->Unit
+
+// Named parameter is prohibited because of possible inconsistency between
+// type declaration and actual override
+class C : (<!UNSUPPORTED!>x<!>: Int)->Unit {
+    override fun invoke(p1: Int): Unit {}
+}

compiler/testData/diagnostics/tests/NamedFunctionTypeParameterInSupertype.txt

@@ -0,0 +1,25 @@
+package
+
+public abstract class A : (kotlin.Any) -> kotlin.Unit {
+    public constructor A()
+    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 abstract override /*1*/ /*fake_override*/ fun invoke(/*0*/ p1: kotlin.Any): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public abstract class B : (kotlin.Int) -> kotlin.Unit {
+    public constructor B()
+    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 abstract override /*1*/ /*fake_override*/ fun invoke(/*0*/ p1: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class C : (kotlin.Int) -> kotlin.Unit {
+    public constructor C()
+    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*/ fun invoke(/*0*/ p1: kotlin.Int): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}

compiler/testData/diagnostics/tests/incompleteCode/diagnosticWithSyntaxError/funcitonTypes.kt

@@ -1 +1 @@
-class A : (categoryName: <!SYNTAX!><!>)<!SYNTAX!><!> <!SYNTAX!><!>{<!SYNTAX!><!>
+class A : (<!UNSUPPORTED!>categoryName<!>: <!SYNTAX!><!>)<!SYNTAX!><!> <!SYNTAX!><!>{<!SYNTAX!><!>

compiler/testData/diagnostics/tests/incompleteCode/diagnosticWithSyntaxError/typeReferenceError.kt

@@ -1,3 +1,3 @@
 package typeReferenceError
 
-<!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>class Pair<!><<!SYNTAX!><!>:(<!UNSUPPORTED!>val<!> c: <!SYNTAX!><!SYNTAX!><!>fun<!><!SYNTAX!><!> <!UNRESOLVED_REFERENCE!>main<!>()
+<!ABSTRACT_MEMBER_NOT_IMPLEMENTED!>class Pair<!><<!SYNTAX!><!>:(<!UNSUPPORTED!>val<!> <!UNSUPPORTED!>c<!>: <!SYNTAX!><!SYNTAX!><!>fun<!><!SYNTAX!><!> <!UNRESOLVED_REFERENCE!>main<!>()

compiler/testData/diagnostics/tests/modifiers/modifierOnParameterInFunctionType.kt

@@ -10,7 +10,7 @@ fun inParamNested(fn1: (fn2: (<!UNSUPPORTED!>vararg<!> n: Int)->Unit)->Unit) {}
 
 fun inReturn(): (<!UNSUPPORTED!>vararg<!> x: Int)->Unit = {}
 
-class A : (<!UNSUPPORTED!>vararg<!> x: Int)->Unit {
+class A : (<!UNSUPPORTED!>vararg<!> Int)->Unit {
     override fun invoke(p1: Int) {
         var lambda: (<!UNSUPPORTED!>vararg<!> x: Int)->Unit = {}
     }