Cargo Features

[dependencies]
ink_allocator = { version = "5.1.1", default-features = false, features = ["std", "ink-fuzz-tests", "no-allocator"] }
default = std

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

std default ink-fuzz-tests?
ink-fuzz-tests = std
no-allocator

ink_allocator has 4 features without comments.