Cargo Features

[dependencies]
rosm_pbf_reader = { version = "1.0.2", default-features = false, features = ["flate2"] }
default = flate2

The flate2 feature is set by default whenever rosm_pbf_reader is added without default-features = false somewhere in the dependency tree.

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.

flate2 default