1 error[E0045]: variadic function must have C or cdecl calling convention
4 LL | extern "Rust" { fn foo(x: u8, ...); } //~ ERROR E0045
5 | ^^^^^^^^^^^^^^^^^^^ variadics require C or cdecl calling convention
7 error: aborting due to previous error
9 For more information about this error, try `rustc --explain E0045`.