Cargo Features

cargo-diet has no features set by default.

cargo-diet = { version = "1.2.7", features = ["dev-support"] }
dev-support = rmp-serde

Affects cargo-diet::Options.save_package_for_unit_test

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.

rmp-serde dev-support?