From 21fcc0f4810bc3cc25c6447bcc7755917e4b7856 Mon Sep 17 00:00:00 2001
From: Matej Novotny <manovotn@redhat.com>
Date: Wed, 8 Jan 2025 15:02:06 +0100
Subject: [PATCH] WELD-2806 Prevent compiled lambdas in class from being
 processed as interceptable methods.

---
 impl/src/main/java/org/jboss/weld/util/Beans.java | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/impl/src/main/java/org/jboss/weld/util/Beans.java b/impl/src/main/java/org/jboss/weld/util/Beans.java
index 253761668e..ca97cc0a12 100644
--- a/impl/src/main/java/org/jboss/weld/util/Beans.java
+++ b/impl/src/main/java/org/jboss/weld/util/Beans.java
@@ -20,6 +20,7 @@
 import java.lang.annotation.Annotation;
 import java.lang.annotation.Repeatable;
 import java.lang.reflect.GenericArrayType;
+import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
@@ -169,7 +170,7 @@ public static boolean isBeanProxyable(Bean<?> bean, BeanManagerImpl manager) {
             // note that a bridge method can be a candidate for interception in rare cases; do not discard those
             boolean businessMethod = !annotatedMethod.isStatic() && !annotatedMethod.isAnnotationPresent(Inject.class);
 
-            if (businessMethod && !isInterceptorMethod(annotatedMethod)) {
+            if (businessMethod && !isInterceptorMethod(annotatedMethod) && !isLambdaMethod(annotatedMethod)) {
                 annotatedMethods.add(annotatedMethod);
             }
         }
@@ -185,6 +186,14 @@ private static boolean isInterceptorMethod(AnnotatedMethod<?> annotatedMethod) {
         return false;
     }
 
+    // Lambdas in classes will be compiled into methods declared on that given class.
+    // The exact representation differs between javac (standard compiler) and EJC (Eclipse compiler).
+    // We want to avoid attempting to intercept these methods - note that the detection is on a "best effort" basis.
+    private static boolean isLambdaMethod(AnnotatedMethod<?> annotatedMethod) {
+        Method javaMember = annotatedMethod.getJavaMember();
+        return !javaMember.isBridge() && javaMember.isSynthetic();
+    }
+
     /**
      * Checks that all the qualifiers in the set requiredQualifiers are in the set of qualifiers. Qualifier equality rules for
      * annotation members are followed.