[NI] Get rid of FE 1.0 types in AbstractTypeCheckerContextForConstraintSystem

core/compiler.common/src/org/jetbrains/kotlin/types/model/TypeSystemContext.kt

@@ -173,6 +173,9 @@ interface TypeSystemInferenceExtensionContext : TypeSystemContext, TypeSystemBui
         firstCandidate: KotlinTypeMarker,
         secondCandidate: KotlinTypeMarker
     ): KotlinTypeMarker
+
+    fun TypeConstructorMarker.isTypeVariable(): Boolean
+    fun TypeVariableTypeConstructorMarker.isContainedInInvariantOrContravariantPositions(): Boolean
 }
 
 

core/descriptors/src/org/jetbrains/kotlin/types/checker/ClassicTypeSystemContext.kt

@@ -517,6 +517,14 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         errorSupportedOnlyInTypeInference()
     }
 
+    override fun TypeConstructorMarker.isTypeVariable(): Boolean {
+        errorSupportedOnlyInTypeInference()
+    }
+
+    override fun TypeVariableTypeConstructorMarker.isContainedInInvariantOrContravariantPositions(): Boolean {
+        errorSupportedOnlyInTypeInference()
+    }
+
     override fun findCommonIntegerLiteralTypesSuperType(explicitSupertypes: List<SimpleTypeMarker>): SimpleTypeMarker? {
         @Suppress("UNCHECKED_CAST")
         explicitSupertypes as List<SimpleType>