Different versions of Rust export this symbols or hide it - there's been some semi-recent changes related to this symbol: https://github.com/rust-lang/rust/issues/92102 https://github.com/rust-lang/rust/pull/92845 https://github.com/rust-lang/rust/pull/95604 https://github.com/rust-lang/rust/issues/100774 The `symbols` test should probably not check whether it's in the shared object's symbol table? --- EDIT: Pressed "Submit" too fast. This is on Fedora Rawhide with Rust 1.64.0.