From a9184f8f61a8dd6ad3f52009116fe3edb82f062f Mon Sep 17 00:00:00 2001
From: Michel Davit <micheld@spotify.com>
Date: Tue, 22 Aug 2023 15:56:55 +0200
Subject: [PATCH] Add back runtime check for scala 3

---
 .../src/main/scala-3/magnolify/shared/EnumTypeDerivation.scala | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/shared/src/main/scala-3/magnolify/shared/EnumTypeDerivation.scala b/shared/src/main/scala-3/magnolify/shared/EnumTypeDerivation.scala
index c2fa8072f..7386bc037 100644
--- a/shared/src/main/scala-3/magnolify/shared/EnumTypeDerivation.scala
+++ b/shared/src/main/scala-3/magnolify/shared/EnumTypeDerivation.scala
@@ -20,6 +20,9 @@ import magnolia1.{CaseClass, Derivation, SealedTrait}
 trait EnumTypeDerivation extends Derivation[EnumType]:
 
   def join[T](caseClass: CaseClass[EnumType, T]): EnumType[T] =
+    // fail at runtime since we can't prevent derivation
+    // see https://github.com/softwaremill/magnolia/issues/267
+    require(caseClass.isObject, s"Cannot derive EnumType[T] for case class ${caseClass.typeInfo}")
     val n = caseClass.typeInfo.short
     val ns = caseClass.typeInfo.owner
     EnumType.create(