Error code E0625

A compile-time const variable is referring to a thread-local static variable.

Erroneous code example:

#![allow(unused)] #![feature(thread_local)] fn main() { #[thread_local] static X: usize = 12; const Y: usize = 2 * X; }

Static and const variables can refer to other const variables but a const variable cannot refer to a thread-local static variable. In this example, Y cannot refer to X. To fix this, the value can be extracted as a const and then used:

#![allow(unused)] #![feature(thread_local)] fn main() { const C: usize = 12; #[thread_local] static X: usize = C; const Y: usize = 2 * C; }