[patch.crates-io] ignores all features

[JakkuSakura]

Problem
I was trying to patch some of my deps, with additional features enabled in my workspace. However, features specified in [patch.crates-io] are all ignored.

Steps

[path.crates-io]
async-tungstenite = { git = "https://github.com/qiujiangkun/async-tungstenite", rev="1a544fb13fe46b22aa6df94e49277f49f8ffa8ca", features=["there-is-no-such-feature-whatsoever", "no-verbose-logging"] }

The features are ignored, no error is given(there-is-no-such-feature-whatsoever), and no feature is actually enabled(no-verbose-logging)

Possible Solution(s)
I think we can simply fix it, gives a hard error saying this is not supported, or gives a warning saying features are currently ignored

Output of cargo version:

cargo 1.54.0-nightly (44456677b 2021-06-12)

[weihanglo]

IIRC [patch] is used only for patching sources of dependencies at this moment. For fields related to "conditional compilation", such as features and optional, you still need to specify them in the original [dependencies] section.

[ehuss]

I believe this is a duplicate of #3034, so closing in favor of that. Cargo should at least emit a warning about the unused features.