Cargo Features

[dependencies]
rand_mt = { version = "4.2.2", default-features = false, features = ["rand-traits", "std"] }
default = rand-traits, std

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

rand-traits default = rand_core
std default

Enables std::error::Error impls.

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.

rand_core rand-traits

Enables rand_core

0.6.1 is vulnerable to underfilling a buffer.

https://rustsec.org/advisories/RUSTSEC-2021-0023