Cargo Features

[dependencies]
duplicate = { version = "1.0.0", default-features = false, features = ["pretty_errors", "module_disambiguation", "fail-on-warnings"] }
default = module_disambiguation, pretty_errors

These default features are set whenever duplicate is added without default-features = false somewhere in the dependency tree.

pretty_errors default = proc-macro-error
module_disambiguation default = heck
fail-on-warnings

Forces compilation to fail if any warnings are given. Used in CI.

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.

proc-macro-error pretty_errors
heck module_disambiguation

Enables heck ^0.4.0