diff --git a/independent-projects/arc/processor/src/main/java/io/quarkus/arc/processor/BuiltinBean.java b/independent-projects/arc/processor/src/main/java/io/quarkus/arc/processor/BuiltinBean.java
index 571afe47a3c28..4450caacfd4ef 100644
--- a/independent-projects/arc/processor/src/main/java/io/quarkus/arc/processor/BuiltinBean.java
+++ b/independent-projects/arc/processor/src/main/java/io/quarkus/arc/processor/BuiltinBean.java
@@ -375,7 +375,7 @@ private static void generateListBytecode(GeneratorContext ctx) {
         InjectionPointInfo injectionPoint = ctx.injectionPoint;
         if (injectionPoint.isField()) {
             ctx.reflectionRegistration.registerField(injectionPoint.getAnnotationTarget().asField());
-        } else {
+        } else if (injectionPoint.isParam()) {
             ctx.reflectionRegistration.registerMethod(injectionPoint.getAnnotationTarget().asMethodParameter().method());
         }
 
@@ -475,6 +475,13 @@ private static void validateList(InjectionTargetInfo injectionTarget, InjectionP
             // Note that at this point we can be sure that the required type is List<>
             Type typeParam = injectionPoint.getType().asParameterizedType().arguments().get(0);
             if (typeParam.kind() == Type.Kind.WILDCARD_TYPE) {
+                if (injectionPoint.isSynthetic()) {
+                    errors.accept(
+                            new DefinitionException(
+                                    "Wildcard is not a legal type argument for a synthetic @All List<?> injection point used in: "
+                                            + injectionTarget.toString()));
+                    return;
+                }
                 ClassInfo declaringClass;
                 if (injectionPoint.isField()) {
                     declaringClass = injectionPoint.getAnnotationTarget().asField().declaringClass();
diff --git a/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllInvalidTest.java b/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllInvalidTest.java
new file mode 100644
index 0000000000000..46a1d91c6b095
--- /dev/null
+++ b/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllInvalidTest.java
@@ -0,0 +1,70 @@
+package io.quarkus.arc.test.buildextension.beans;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.List;
+
+import jakarta.enterprise.util.TypeLiteral;
+
+import org.jboss.jandex.AnnotationInstance;
+import org.jboss.jandex.ClassType;
+import org.jboss.jandex.DotName;
+import org.jboss.jandex.ParameterizedType;
+import org.jboss.jandex.WildcardType;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.All;
+import io.quarkus.arc.BeanCreator;
+import io.quarkus.arc.SyntheticCreationalContext;
+import io.quarkus.arc.processor.BeanRegistrar;
+import io.quarkus.arc.test.ArcTestContainer;
+
+public class SyntheticInjectionPointListAllInvalidTest {
+
+    @RegisterExtension
+    public ArcTestContainer container = ArcTestContainer.builder()
+            .beanRegistrars(new TestRegistrar())
+            .shouldFail()
+            .build();
+
+    @Test
+    public void testListAllInjection() {
+        assertNotNull(container.getFailure());
+        assertTrue(container.getFailure().getMessage().contains(
+                "Wildcard is not a legal type argument for a synthetic @All List<?> injection point"));
+    }
+
+    static class SyntheticBean {
+
+        public SyntheticBean(List<?> list) {
+        }
+    }
+
+    static class TestRegistrar implements BeanRegistrar {
+
+        @Override
+        public void register(RegistrationContext context) {
+            context.configure(SyntheticBean.class)
+                    .addType(ClassType.create(DotName.createSimple(SyntheticBean.class)))
+                    .creator(SynthBeanCreator.class)
+                    // add injection point for @All List<?> - wildcard is NOT a legal bean type
+                    .addInjectionPoint(ParameterizedType.create(List.class, WildcardType.UNBOUNDED),
+                            AnnotationInstance.builder(All.class).build())
+                    .unremovable()
+                    .done();
+        }
+
+    }
+
+    public static class SynthBeanCreator implements BeanCreator<SyntheticBean> {
+
+        @Override
+        public SyntheticBean create(SyntheticCreationalContext<SyntheticBean> context) {
+            return new SyntheticBean(context.getInjectedReference(new TypeLiteral<List<?>>() {
+            }, All.Literal.INSTANCE));
+        }
+
+    }
+}
diff --git a/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllTest.java b/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllTest.java
new file mode 100644
index 0000000000000..0b059a6f83600
--- /dev/null
+++ b/independent-projects/arc/tests/src/test/java/io/quarkus/arc/test/buildextension/beans/SyntheticInjectionPointListAllTest.java
@@ -0,0 +1,88 @@
+package io.quarkus.arc.test.buildextension.beans;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+import java.util.List;
+
+import jakarta.enterprise.util.TypeLiteral;
+import jakarta.inject.Singleton;
+
+import org.jboss.jandex.AnnotationInstance;
+import org.jboss.jandex.ClassType;
+import org.jboss.jandex.DotName;
+import org.jboss.jandex.ParameterizedType;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.arc.All;
+import io.quarkus.arc.Arc;
+import io.quarkus.arc.BeanCreator;
+import io.quarkus.arc.SyntheticCreationalContext;
+import io.quarkus.arc.processor.BeanRegistrar;
+import io.quarkus.arc.test.ArcTestContainer;
+
+public class SyntheticInjectionPointListAllTest {
+
+    @RegisterExtension
+    public ArcTestContainer container = ArcTestContainer.builder()
+            .beanClasses(SomeBean.class)
+            .beanRegistrars(new TestRegistrar()).build();
+
+    @Test
+    public void testListAllInjection() {
+        SyntheticBean synthBean = Arc.container().instance(SyntheticBean.class).get();
+        assertNotNull(synthBean);
+        List<SomeBean> list = synthBean.getList();
+        assertNotNull(list);
+        assertEquals(1, list.size());
+    }
+
+    @Singleton
+    static class SomeBean {
+
+        public String ping() {
+            return SomeBean.class.getSimpleName();
+        }
+
+    }
+
+    static class SyntheticBean {
+
+        private List<SomeBean> list;
+
+        public SyntheticBean(List<SomeBean> list) {
+            this.list = list;
+        }
+
+        public List<SomeBean> getList() {
+            return list;
+        }
+    }
+
+    static class TestRegistrar implements BeanRegistrar {
+
+        @Override
+        public void register(RegistrationContext context) {
+            context.configure(SyntheticBean.class)
+                    .addType(ClassType.create(DotName.createSimple(SyntheticBean.class)))
+                    .creator(SynthBeanCreator.class)
+                    // add injection point for @All List<SomeBean>
+                    .addInjectionPoint(ParameterizedType.create(List.class, ClassType.create(SomeBean.class)),
+                            AnnotationInstance.builder(All.class).build())
+                    .unremovable()
+                    .done();
+        }
+
+    }
+
+    public static class SynthBeanCreator implements BeanCreator<SyntheticBean> {
+
+        @Override
+        public SyntheticBean create(SyntheticCreationalContext<SyntheticBean> context) {
+            return new SyntheticBean(context.getInjectedReference(new TypeLiteral<List<SomeBean>>() {
+            }, All.Literal.INSTANCE));
+        }
+
+    }
+}