Cargo Features

[dependencies]
fast-list = { version = "0.1.8", default-features = false, features = ["std", "hashbrown", "unstable"] }
default = hashbrown, std

These default features are set whenever fast-list is added without default-features = false somewhere in the dependency tree.

std default
hashbrown default

Enables hashbrown ^0.14.3

unstable

fast-list has 4 features without comments.