Error code E0013

Static and const variables can refer to other const variables. But a const variable cannot refer to a static variable.

Erroneous code example:

#![allow(unused)]
fn main() {
static X: i32 = 42;
const Y: i32 = X;
}

In this example, Y cannot refer to X. To fix this, the value can be extracted as a const and then used:

#![allow(unused)]
fn main() {
const A: i32 = 42;
static X: i32 = A;
const Y: i32 = A;
}