Error code E0137

Note: this error code is no longer emitted by the compiler.

More than one function was declared with the #[main] attribute.

Erroneous code example:

#![allow(unused)] #![feature(main)] fn main() { #[main] fn foo() {} #[main] fn f() {} // error: multiple functions with a `#[main]` attribute }

This error indicates that the compiler found multiple functions with the #[main] attribute. This is an error because there must be a unique entry point into a Rust program. Example:

#![allow(unused)] #![feature(main)] fn main() { #[main] fn f() {} // ok! }