[FIR] DATA_CLASS_OVERRIDE_CONFLICT diagnostic

compiler/testData/diagnostics/tests/dataClasses/dataInheritance.fir.kt

@@ -1,13 +0,0 @@
-interface SuperInterface
-
-open class SuperClass
-
-<!INCOMPATIBLE_MODIFIERS!>abstract<!> <!INCOMPATIBLE_MODIFIERS!>data<!> class Base(val x: Int)
-
-class Derived: Base(42)
-
-data class Nasty(val z: Int, val y: Int): Base(z)
-
-data class Complex(val y: Int): SuperInterface, SuperClass()
-
-data class SubData(val sss: String) : <!FINAL_SUPERTYPE!>Complex<!>(42)

compiler/testData/diagnostics/tests/dataClasses/dataInheritance.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 interface SuperInterface
 
 open class SuperClass

compiler/testData/diagnostics/tests/dataClasses/implementTraitWhichHasFinalComponent1.fir.kt

@@ -2,4 +2,4 @@ interface T {
     final fun component1(): Int = 42
 }
 
-data class A(val x: Int) : T
+<!DATA_CLASS_OVERRIDE_CONFLICT!>data<!> class A(val x: Int) : T