Cargo Features

rustls-pki-types = { version = "1.4.1", default-features = false, features = ["std", "alloc", "web"] }
default = alloc

The alloc feature is set by default whenever rustls-pki-types is added without default-features = false somewhere in the dependency tree.

std = alloc
alloc default std?
web = web-time

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.

web-time wasm unknown web?