Cargo Features

bxCAN has no features set by default.

[dependencies]
bxcan = { version = "0.8.0", features = ["unstable-defmt"] }
unstable-defmt = defmt

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

defmt unstable-defmt?