Cargo Features

[dependencies]
catnip = { version = "0.3.1", default-features = false, features = ["panic_never", "no_std"] }
default = no_std

Just for clarity; in fact, we are always no-std and panic-never compatible

panic_never = panic-never

Bring in the actual panic-never panic handler

no_std default

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.

panic-never panic_never?