From 95655623c715ea38b11d9fd2464bbd3603ba785f Mon Sep 17 00:00:00 2001
From: Charles Oliver Nutter <headius@headius.com>
Date: Mon, 26 Feb 2024 12:14:21 -0600
Subject: [PATCH] Handle prepended shims like included shims

Fixes #8121
---
 core/src/main/java/org/jruby/RubyClass.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/main/java/org/jruby/RubyClass.java b/core/src/main/java/org/jruby/RubyClass.java
index 00ff7353765..116fb8b1af1 100644
--- a/core/src/main/java/org/jruby/RubyClass.java
+++ b/core/src/main/java/org/jruby/RubyClass.java
@@ -1087,7 +1087,7 @@ private void concreteSubclasses(Collection<RubyClass> subs) {
             Set<RubyClass> keys = subclasses.keySet();
             for (RubyClass klass: keys) {
                 if (klass.isSingleton()) continue;
-                if (klass.isIncluded()) {
+                if (klass.isIncluded() || klass.isPrepended()) {
                     klass.concreteSubclasses(subs);
                     continue;
                 }