Cargo Features

[dependencies]
wasm-instrument = { version = "0.4.0", default-features = false, features = ["std", "sign_ext"] }
default = std

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

std default

Enables std of parity-wasm

sign_ext

Enables sign_ext of parity-wasm

parity-wasm:

Sign-extension operators https://github.com/WebAssembly/sign-extension-ops/

wasm-instrument has 3 features without comments.