tests/ui/transmutability/malformed-program-gracefulness/feature-missing.rs

// The trait must not be available if its feature flag is absent.

#![crate_type = "lib"]

use std::mem::TransmuteFrom;
//~^ ERROR use of unstable library feature `transmutability` [E0658]

use std::mem::Assume;
//~^ ERROR use of unstable library feature `transmutability` [E0658]