Cargo Features

[dependencies]
lock_cell = { version = "0.6.0", default-features = false, features = ["debug_lockcell", "enable_std", "logging"] }
default = enable_std

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

debug_lockcell
enable_std default
logging

rust-analyzer wants this feature present here.