[Console] InvalidArgumentException is thrown under wrong condition#17818

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robinkanters wants to merge 1 commit intosymfony:masterfrom

robinkanters:bugfix/logic-instanceof-countable

Commits on Feb 16, 2016

The exception should be thrown if an object doesn't implement Traversable AND doesn't implement Countable, not when it doesn't implement Traversable but DOES implement Countable
Robin Kanters
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