Cargo Features

[dependencies]
supply-chain-trust-example-crate-000003 = { version = "1.0.90", default-features = false, features = ["nightly", "proc-macro", "span-locations"] }
default = proc-macro

The proc-macro feature is set by default whenever supply-chain-trust-example-crate-000003 is added without default-features = false somewhere in the dependency tree.

nightly
proc-macro default
span-locations

supply-chain-trust-example-crate-000003 has 4 features without comments.