Cargo Features

[dependencies]
abort-if = { version = "0.1.2", default-features = false, features = ["default_abort", "custom_abort", "keep_going"] }
default = default_abort

The default_abort feature is set by default whenever abort-if is added without default-features = false somewhere in the dependency tree.

default_abort default
custom_abort keep_going?
keep_going = custom_abort

Abort-if has 4 features without comments.