BurntSushi/quickcheck — pull request #46 by japaric (2014-12-23 18:43:18+00:00)
Title: fix: functions are now unique types and require casting to function pointers

See rust-lang/rust#19891

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To test locally I have used this fork of `collect-rs` (Gankro/collect-rs#39), since the original one is still broken with today's nightly.

The macro source code could probably use better naming...