Cargo Features

[dependencies]
concurrent-hashmap = { version = "0.2.2", default-features = false, features = ["unstable"] }
default = unstable

The unstable feature is set by default whenever concurrent-hashmap is added without default-features = false somewhere in the dependency tree.

unstable default

Enables asm of spin ^0.4.5

concurrent-hashmap has 2 features without comments.