zendframework/zf2 — pull request #5890 by leogr (2014-03-01 12:07:35+00:00)
Title: Hotfix/5640 for bug in nested Zend\Form\Element\Collection::extract() recursion

This PR fixes a problem in "Recursively extract and populate values for nested fieldsets" for the use case of nested collections as described by #5640

Maybe this is not the definitive solution, but it includes a test for nested collections and a fix that solves the problem without breaking any other tested behaviours.