Compilation inconsistency when referencing the same code over path and git/version

[k06a]

Problem
I got the true compilation errors when referenced dependency with path. And see no errors when reference over git of version in TOML file.

Steps
Check this demo repo: https://github.com/k06a/usize-issue

Notes
Output of cargo version:
cargo 1.41.0-nightly (626f0f4 2019-12-03)

[ehuss]

This is intentional. Dependencies are usually built with --cap-lints=allow to hide lint warnings (and deny-by-default lints). Workspace members and path dependencies are not capped. This is done with the intent that you are working on the package and want to see the warnings.

[k06a]

@ehuss having such kind of problems was highly unexpected. I mean assigning out-of-range values to integral types.

[weihanglo]

With #12115, we may have lint control over warnings from Cargo itself in the future. This issue can gain some benefits from that.

[weihanglo]

I think this is kinda a duplicate of #5998, and both of them are waiting for the [lints] feature stabilization, so that we will have a dedicated documentation for how Cargo handles lints. Close in favor of #5998.