Cargo Features

[dependencies]
copa = { version = "0.12.0", default-features = false, features = ["no_std", "nightly"] }
default = no_std

The no_std feature is set by default whenever copa is added without default-features = false somewhere in the dependency tree.

no_std default = arrayvec
nightly

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.

arrayvec no_std