bors 176ee349a7 Auto merge of #30542 - nrc:errs-base, r=nagisa
As discussed [here](https://internals.rust-lang.org/t/more-structured-errors/3005)

r? @nikomatsakis or anyone else on the @rust-lang/compiler team
2015-12-30 12:27:10 +00:00
..
2015-12-30 14:27:59 +13:00
2015-12-28 18:08:16 +00:00
2015-12-30 14:27:59 +13:00
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