Cargo Features

[dependencies]
muta-std = { version = "0.1.0", default-features = false, features = ["ckb-allocator"] }
default = ckb-allocator

The ckb-allocator feature is set by default whenever muta-std is added without default-features = false somewhere in the dependency tree.

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.

ckb-allocator default