Error code E0092

An undefined atomic operation function was declared.

Erroneous code example:

#![allow(unused)] #![feature(intrinsics)] #![allow(internal_features)] fn main() { extern "rust-intrinsic" { fn atomic_foo(); // error: unrecognized atomic operation // function } }

Please check you didn't make a mistake in the function's name. All intrinsic functions are defined in compiler/rustc_codegen_llvm/src/intrinsic.rs and in library/core/src/intrinsics.rs in the Rust source code. Example:

#![allow(unused)] #![feature(intrinsics)] #![allow(internal_features)] fn main() { extern "rust-intrinsic" { fn atomic_fence_seqcst(); // ok! } }