tests/ui/error-codes/E0594.rs - toolchain/rustc - Git at Google

 static NUM: i32 = 18;

 fn main() {
     NUM = 20; //~ ERROR cannot assign to immutable static item `NUM`
 }
	static NUM: i32 = 18;

	fn main() {
	NUM = 20; //~ ERROR cannot assign to immutable static item `NUM`
	}