Cargo Features

[dependencies]
deferred-reference = { version = "0.1.2", default-features = false, features = ["unstable", "slice_ptr_len", "coerce_unsized"] }
default = unstable

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

unstable default = coerce_unsized, slice_ptr_len
slice_ptr_len unstable
coerce_unsized unstable

deferred-reference has 4 features without comments.