Ecosystem (crater) testing for core crates

[ryankurte]

given we have a set of foundational crates depended on by practically the whole ecosystem (like https://github.com/rust-embedded/embedded-hal/), the risk of changes to these foundational crates causing large volumes of annoyance is pretty high.

it'd be awesome to have https://github.com/rust-lang/crater (or something like it) running over consumers of these crates so we can be informed of and mitigate the impacts of any necessary breakage.

possibly related to: #381

cc. @therealprof

[jamesmunns]

CC @pietroalbini

[pietroalbini]

Would you like just cross-compilation or also running tests?

[ryankurte]

i think just cross compilation (including the test suite), afaik the issues we're looking to avoid are all around types and interfaces so should be p much (where things can compile for a given target) target independent, and shouldn't require test running.

[pietroalbini]

That should be possible, but I'm not sure how it's best to integrate it with Crater off the top of my head.