Error on using extension function type as an upper bound

compiler/testData/diagnostics/tests/generics/nullability/functionalBound.kt

@@ -1,13 +1,13 @@
-fun <E : String?, T : ((CharSequence).() -> Unit)?> foo(x: E, y: T) {
+fun <E : String?, T : ((CharSequence) -> Unit)?> foo(x: E, y: T) {
     if (x != null) {
-        <!DEBUG_INFO_SMARTCAST!>x<!>.<!UNSAFE_CALL, INVOKE_EXTENSION_ON_NOT_EXTENSION_FUNCTION!>y<!>()
+        <!UNSAFE_CALL!>y<!>(<!DEBUG_INFO_SMARTCAST!>x<!>)
     }
 
     if (y != null) {
-        x<!UNSAFE_CALL!>.<!><!INVOKE_EXTENSION_ON_NOT_EXTENSION_FUNCTION, DEBUG_INFO_SMARTCAST!>y<!>()
+        <!DEBUG_INFO_SMARTCAST!>y<!>(<!TYPE_MISMATCH!>x<!>)
     }
 
     if (x != null && y != null) {
-        <!DEBUG_INFO_SMARTCAST!>x<!>.<!INVOKE_EXTENSION_ON_NOT_EXTENSION_FUNCTION, DEBUG_INFO_SMARTCAST!>y<!>()
+        <!DEBUG_INFO_SMARTCAST!>y<!>(<!DEBUG_INFO_SMARTCAST!>x<!>)
     }
 }

compiler/testData/diagnostics/tests/generics/nullability/functionalBound.txt

@@ -1,3 +1,3 @@
 package
 
-public fun </*0*/ E : kotlin.String?, /*1*/ T : (kotlin.CharSequence.() -> kotlin.Unit)?> foo(/*0*/ x: E, /*1*/ y: T): kotlin.Unit
+public fun </*0*/ E : kotlin.String?, /*1*/ T : ((kotlin.CharSequence) -> kotlin.Unit)?> foo(/*0*/ x: E, /*1*/ y: T): kotlin.Unit

compiler/testData/diagnostics/tests/typeParameters/extFunctionTypeAsUpperBound.kt

@@ -0,0 +1,7 @@
+fun <T: <!UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE!>Int.() -> String<!>> foo() {}
+
+val <<!TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER!>T: <!UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE!>Int.() -> String<!><!>> bar = fun (x: Int): String { return x.toString() }
+
+class A<T> where T : <!UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE!>Double.(Int) -> Unit<!>
+
+interface B<T, U : <!UPPER_BOUND_IS_EXTENSION_FUNCTION_TYPE!>T.() -> Unit<!>>

compiler/testData/diagnostics/tests/typeParameters/extFunctionTypeAsUpperBound.txt

@@ -0,0 +1,17 @@
+package
+
+public val </*0*/ T : kotlin.Int.() -> kotlin.String> bar: (kotlin.Int) -> kotlin.String
+public fun </*0*/ T : kotlin.Int.() -> kotlin.String> foo(): kotlin.Unit
+
+public final class A</*0*/ T : kotlin.Double.(kotlin.Int) -> kotlin.Unit> {
+    public constructor A</*0*/ T : kotlin.Double.(kotlin.Int) -> kotlin.Unit>()
+    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 interface B</*0*/ T, /*1*/ U : T.() -> kotlin.Unit> {
+    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
+}

compiler/testData/diagnostics/tests/typeParameters/functionTypeAsUpperBound.kt

@@ -0,0 +1,7 @@
+fun <T: (Int) -> String> foo() {}
+
+val <<!TYPE_PARAMETER_OF_PROPERTY_NOT_USED_IN_RECEIVER!>T: (kotlin.Int) -> kotlin.String<!>> bar = fun (x: Int): String { return x.toString() }
+
+class A<T, U, V> where T : () -> Unit, U : (Int) -> Double, V : (T, U) -> U
+
+interface B<T, U : (T) -> Unit>

compiler/testData/diagnostics/tests/typeParameters/functionTypeAsUpperBound.txt

@@ -0,0 +1,17 @@
+package
+
+public val </*0*/ T : (kotlin.Int) -> kotlin.String> bar: (kotlin.Int) -> kotlin.String
+public fun </*0*/ T : (kotlin.Int) -> kotlin.String> foo(): kotlin.Unit
+
+public final class A</*0*/ T : () -> kotlin.Unit, /*1*/ U : (kotlin.Int) -> kotlin.Double, /*2*/ V : (T, U) -> U> {
+    public constructor A</*0*/ T : () -> kotlin.Unit, /*1*/ U : (kotlin.Int) -> kotlin.Double, /*2*/ V : (T, U) -> U>()
+    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 interface B</*0*/ T, /*1*/ U : (T) -> kotlin.Unit> {
+    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
+}