From aab80015b8e9672dfceff1fdce021be25b752a60 Mon Sep 17 00:00:00 2001
From: Shadaj Laddad <shadaj@users.noreply.github.com>
Date: Sun, 12 Nov 2017 19:30:57 -0800
Subject: Restore ability to derive typeclasses for case classes inside other
 classes

---
 core/shared/src/main/scala/magnolia.scala | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/core/shared/src/main/scala/magnolia.scala b/core/shared/src/main/scala/magnolia.scala
index 6400002..9df3532 100644
--- a/core/shared/src/main/scala/magnolia.scala
+++ b/core/shared/src/main/scala/magnolia.scala
@@ -278,10 +278,10 @@ object Magnolia {
         val preAssignments = caseParams.map(_.typeclass)
 
         val defaults = if (!isValueClass) {
-          val caseClassCompanion = genericType.companion
-          val constructorMethod = caseClassCompanion.decl(TermName("apply")).asMethod
-          val indexedConstructorParams =
-            constructorMethod.paramLists.head.map(_.asTerm).zipWithIndex
+          val caseClassParameters = genericType.decls.collect {
+            case m: MethodSymbol if m.isCaseAccessor => m.asMethod
+          }
+          val indexedConstructorParams = caseClassParameters.map(_.asTerm).zipWithIndex
 
           indexedConstructorParams.map {
             case (p, idx) =>
-- 
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