HHH-16120 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/collection/list/Child.java

@@ -0,0 +1,46 @@
+package org.hibernate.orm.test.collection.list;
+
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+public class Child {
+	private Integer id;
+	private String name;
+
+
+	private Parent parent;
+
+	public Child() {
+	}
+
+	public Child(Integer id, String name) {
+		this.id = id;
+		this.name = name;
+	}
+
+	@Id
+	public Integer getId() {
+		return id;
+	}
+
+	public void setId(Integer id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	@ManyToOne
+	public Parent getParent() {
+		return parent;
+	}
+
+	public void setParent(Parent parent) {
+		this.parent = parent;
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/collection/list/IterateOverListInTheSetMethodTest.java

@@ -0,0 +1,40 @@
+package org.hibernate.orm.test.collection.list;
+
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+@DomainModel(
+		xmlMappings = "org/hibernate/orm/test/collection/list/ParentChildMapping.hbm.xml"
+)
+@SessionFactory
+public class IterateOverListInTheSetMethodTest {
+
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					Child child = new Child( 1, "Luigi" );
+					Child child2 = new Child( 2, "Franco" );
+					Parent parent = new Parent( 2, "Fabio" );
+					parent.addChild( child );
+					parent.addChild( child2 );
+
+					session.persist( parent );
+					session.persist( child );
+					session.persist( child2 );
+				}
+		);
+	}
+
+	@Test
+	public void testHqlQuery(SessionFactoryScope scope) {
+		scope.inSession(
+				session -> {
+					session.createQuery( "select p from Parent p" ).list();
+				}
+		);
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/collection/list/Parent.java

@@ -0,0 +1,62 @@
+package org.hibernate.orm.test.collection.list;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import jakarta.persistence.CascadeType;
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.OneToMany;
+
+public class Parent {
+
+	private Integer id;
+	private String name;
+
+
+	private List<Child> children = new ArrayList<>();
+
+	public Parent() {
+	}
+
+	public Parent(Integer id, String name) {
+		this.id = id;
+		this.name = name;
+	}
+
+	@Id
+	public Integer getId() {
+		return id;
+	}
+
+	public void setId(Integer id) {
+		this.id = id;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public List<Child> getChildren() {
+		return children;
+	}
+
+	public void setChildren(List<Child> children) {
+		this.children = children;
+		for ( Iterator<Child> i = children.iterator(); i.hasNext(); ) {
+			if ( i.next() == null ) {
+				i.remove();
+			}
+		}
+	}
+
+	public void addChild(Child child) {
+		this.children.add( child );
+		child.setParent( this );
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/collection/list/ParentChildMapping.hbm.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
+        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
+
+<hibernate-mapping default-lazy="false" package="org.hibernate.orm.test.collection.list">
+    <class name="Parent" table="custom_field">
+        <id name="id"/>
+        <property name="name" column="name"/>
+        <list name="children" inverse="true" cascade="all-delete-orphan">
+            <key column="custom_field_id"/>
+            <index column="seq_num"/>
+            <one-to-many class="Child"/>
+        </list>
+    </class>
+    <class name="Child" table="custom_field_option">
+        <id name="id"/>
+        <many-to-one name="parent" not-null="true" column="custom_field_id"/>
+    </class>
+</hibernate-mapping>