A fairly basic deletion of a persistent object results in a NullPointerException in ActionQueue.resumeSuspendedDeletions. The same code did not produce the exception in Hibernate beta 4.

I will look into the source code of Hibernate later on when time permits and add a more detailed description of scenario that led to this error. The error was produced running Junit tests after migrating from beta4 to rc1.
I wan't to know if anybody else has the same problem.


Hibernate version: 3.0r1

<list name="children"
lazy="true"
inverse="false"
access="field"
cascade="all">

<key column="parent_id"/>
<index column="parent_idx"/>
<one-to-many class="nl.tresparc.model.TDItem" />
</list>

Basic Java code which removes a child element from the collection
--
children.remove(item);
item.parent = null;
currentSession().delete(item);
--

Results in the following exception:

java.lang.NullPointerException
at java.util.ArrayList.addAll(ArrayList.java:474)
at org.hibernate.engine.ActionQueue.resumeSuspendedDeletions(ActionQueue.java:337)
at org.hibernate.event.def.DefaultDeleteEventListener.deleteEntity(DefaultDeleteEventListener.java:223)
at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:108)
at org.hibernate.impl.SessionImpl.delete(SessionImpl.java:535)
at org.hibernate.engine.Cascades$1.cascade(Cascades.java:67)
at org.hibernate.engine.Cascades.cascade(Cascades.java:721)
at org.hibernate.engine.Cascades.cascadeCollection(Cascades.java:860)
at org.hibernate.engine.Cascades.cascade(Cascades.java:739)
at org.hibernate.engine.Cascades.cascade(Cascades.java:817)
at org.hibernate.engine.Cascades.cascade(Cascades.java:789)
at org.hibernate.event.def.DefaultDeleteEventListener.cascadeBeforeDelete(DefaultDeleteEventListener.java:246)
at org.hibernate.event.def.DefaultDeleteEventListener.deleteEntity(DefaultDeleteEventListener.java:199)
at org.hibernate.event.def.DefaultDeleteEventListener.onDelete(DefaultDeleteEventListener.java:108)
at org.hibernate.impl.SessionImpl.delete(SessionImpl.java:527)
at nl.tresparc.model.TDWasteBasketItem.empty(TDWasteBasketItem.java:72)

Retrieved the latest from CVS and it seems that the problem is fixed.