[FIR] Return error type from common super type if it present

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

@@ -30,6 +30,8 @@ import kotlin.contracts.ExperimentalContracts
 import kotlin.contracts.contract
 
 interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSystemCommonBackendContext {
+    override val isErrorTypeAllowed: Boolean get() = true
+
     override fun TypeConstructorMarker.isDenotable(): Boolean {
         require(this is TypeConstructor, this::errorMessage)
         return this.isDenotable
@@ -56,6 +58,10 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return this.isError
     }
 
+    override fun TypeConstructorMarker.toErrorType(): SimpleTypeMarker {
+        throw IllegalStateException("Should not be called")
+    }
+
     override fun KotlinTypeMarker.isUninferredParameter(): Boolean {
         require(this is KotlinType, this::errorMessage)
         return ErrorUtils.isUninferredParameter(this)
@@ -469,6 +475,10 @@ interface ClassicTypeSystemContext : TypeSystemInferenceExtensionContext, TypeSy
         return IntegerLiteralTypeConstructor.findCommonSuperType(explicitSupertypes)
     }
 
+    override fun TypeConstructorMarker.isError(): Boolean {
+        throw IllegalStateException("Should not be called")
+    }
+
     override fun TypeConstructorMarker.getApproximatedIntegerLiteralType(): KotlinTypeMarker {
         require(this is IntegerLiteralTypeConstructor, this::errorMessage)
         return this.getApproximatedType().unwrap()