Cargo Features

[dependencies]
inconceivable = { version = "0.9.0", default-features = false, features = ["std", "ub_inconceivable", "RUSTC_VERSION_GE_1_27"] }
default = std

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

std default
ub_inconceivable
RUSTC_VERSION_GE_1_27

Inconceivable has 4 features without comments.