Cargo Features

queryst = { version = "3.0.0", default-features = false, features = ["regex1"] }
default = regex1

The regex1 feature is set by default whenever queryst is added without default-features = false somewhere in the dependency tree.

regex1 default = lazy_static, regex

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.

regex regex1
lazy_static regex1