src/test/ui/thread-local-mutation.rs

   1 // Regression test for #54901: immutable thread locals could be mutated. See:
   2 // https://github.com/rust-lang/rust/issues/29594#issuecomment-328177697
   3 // https://github.com/rust-lang/rust/issues/54901
   4
   5 #![feature(thread_local)]
   6
   7 #[thread_local]
   8 static S: &str = "before";
   9
  10 fn set_s() {
  11     S = "after"; //~ ERROR cannot assign to immutable
  12 }
  13
  14 fn main() {
  15     println!("{}", S);
  16     set_s();
  17     println!("{}", S);
  18 }