ZF2-512: InputFilter cannot be serialized


Both ValidatorChain and InputFilterChain have references to ServiceManager, which in turn registers Traits. For this reason chains cannot be serialized, and as a result InputFilter cannot be serialized.

According to my tests, cached (and serialized) InputFilter adds 10X performance improvement compared to InputFilter that is initialized from the scratch.


Pull request coming soon, the fix is dead simple.

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