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From Cyrille Artho <>
Subject Bugs in Apache commons collections, version 4.0
Date Thu, 10 Apr 2014 04:54:45 GMT
Dear developers,
We have found several issues in Apache commons collections, version
4.0. We have grouped similar issues into one bug report (as the root cause
may be in one place or the same problem in a few isolated places).

Here are the direct links; please look at the bug tracker for details. We
would appreciate feedback on whether these test reveal real issues, and on
how useful they are to confirm/understand the issues.

* equals/hashCode mismatch:

* NullPointerException in transformations:

(This may be intended except that according to the documentation,
IllegalArgumentException should probably be thrown.)

* NullPointerException in mapBackedSet:

Either the documentation or the code needs a minor update here.

* A strange ClassCastException:

* NullPointerException in MapUtils.toProperties:

This is probably a corner case that can be dealt with more gracefully.
Cyrille Artho -
Those who will not reason, are bigots, those who cannot,
are fools, and those who dare not, are slaves.
		-- George Gordon Noel Byron

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