#![feature(unstable_test_feature)] //@ aux-build:unstable.rs extern crate unstable; use unstable::UnstableEnum; fn main() { match UnstableEnum::Stable { UnstableEnum::Stable => {} UnstableEnum::Stable2 => {} } //~^^^^ non-exhaustive patterns: `UnstableEnum::Unstable` not covered // Ok: all variants are explicitly matched match UnstableEnum::Stable { UnstableEnum::Stable => {} UnstableEnum::Stable2 => {} UnstableEnum::Unstable => {} } }