Error code E0754

A non-ASCII identifier was used in an invalid context.

Erroneous code examples:

mod řųśť; // error! #[no_mangle] fn řųśť() {} // error! fn main() {}

Non-ASCII can be used as module names if it is inlined or if a #[path] attribute is specified. For example:

mod řųśť { // ok! const IS_GREAT: bool = true; } fn main() {}