Cargo Features

[dependencies]
rust-argon2 = { version = "3.0.0", default-features = false, features = ["serde", "crossbeam-utils"] }
default = crossbeam-utils

The crossbeam-utils feature is set by default whenever rust-argon2 is added without default-features = false somewhere in the dependency tree.

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.

serde implicit feature

Enables serde

serde:

A generic serialization/deserialization framework

crossbeam-utils default