This document maintains a list of exceptions from the unstable Rust usage policy, which is documented in docs/rust.md.
Note: Before the policy was introduced, several targets were already utilizing unstable features. Such pre-existing instances (that are not in this list) should not be considered precedents that justify approval for future use of such features.
#![feature(portable_simd)] in the ETC1 encoder: https://docs.google.com/document/d/1lh9x43gtqXFh5bP1LeYevWj0EcIRgIu0XGahHY08aeY/edit?tab=t.0