[COLLECTIONS-514] NullPointerException in MapBackedSet.mapBackedSet

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 4.0
• Component/s: Bag, Collection, Set

Environment

MacOS 10.9, Java 6

• Assignee: Unassigned
• Reporter: Cyrille Artho
• Created: 10/Apr/14 04:31
• Updated: 27/Nov/15 21:47
• Resolved: 10/Apr/14 20:59

Description

It seems that addAll has issues with adding a set that is backed by a singleton map with entry null -> null. However, the javadoc of the involved classes does not state that null entries are disallowed.
Either the code should allow adding a null entry to a bag, or the documentation should state that null entries are not allowed.

See the attached unit test in JUnit format to reproduce the problem.