Auto merge of #2470 - alexcrichton:better-path-error-message, r=brson
authorbors <bors@rust-lang.org>
Fri, 11 Mar 2016 23:48:59 +0000 (15:48 -0800)
committerbors <bors@rust-lang.org>
Fri, 11 Mar 2016 23:48:59 +0000 (15:48 -0800)
Improve the error message for missing path overrides

Closes #2457


Trivial merge