Cargo Features

[dependencies]
ed25519-bip32-core = { version = "0.1.1", default-features = false, features = ["std", "with-bench"] }
default = std

The std feature is set by default whenever ed25519-bip32-core is added without default-features = false somewhere in the dependency tree.

std default
with-bench

ed25519-bip32-core has 3 features without comments.