This bug is still present in Hibernate v5 :

java.lang.IllegalArgumentException: Parameter value element [class xxxx.Yyyyy] did not match expected type [java.lang.Integer (n/a)]
at org.hibernate.jpa.spi.BaseQueryImpl.validateCollectionValuedParameterBinding(BaseQueryImpl.java:881)
at org.hibernate.jpa.spi.BaseQueryImpl.validateBinding(BaseQueryImpl.java:850)
at org.hibernate.jpa.internal.QueryImpl.access$000(QueryImpl.java:62)
at org.hibernate.jpa.internal.QueryImpl$ParameterRegistrationImpl.bindValue(QueryImpl.java:235)
at org.hibernate.jpa.spi.BaseQueryImpl.setParameter(BaseQueryImpl.java:603)
at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:163)
at org.hibernate.jpa.spi.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:32)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)