Error code E0138

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

Erroneous code example:

#![allow(unused)] #![feature(start)] fn main() { #[start] fn foo(argc: isize, argv: *const *const u8) -> isize {} #[start] fn f(argc: isize, argv: *const *const u8) -> isize {} // error: multiple 'start' functions }

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

#![allow(unused)] #![feature(start)] fn main() { #[start] fn foo(argc: isize, argv: *const *const u8) -> isize { 0 } // ok! }