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Re:Announcing Rust 1.7 by cies on Thursday March 03, 2016 @05:04PM (#11220416)
Should also have a look at http://stackage.org (quite similar but in Haskell, yet curated -- a "try to compile all" feature also exists IIRC).

Not sure how much this is used in order to test impact language changes.

Re:Announcing Rust 1.7 by ibotty on Friday March 04, 2016 @03:44AM (#11222690)
It regularly is.