tests/ui/consts/const-eval/mod-static-with-const-fn.rs

   1 // New test for #53818: modifying static memory at compile-time is not allowed.
   2 // The test should never compile successfully
   3
   4 #![feature(const_mut_refs)]
   5
   6 use std::cell::UnsafeCell;
   7
   8 struct Foo(UnsafeCell<u32>);
   9
  10 unsafe impl Send for Foo {}
  11 unsafe impl Sync for Foo {}
  12
  13 static FOO: Foo = Foo(UnsafeCell::new(42));
  14
  15 static BAR: () = unsafe {
  16     *FOO.0.get() = 5;
  17     //~^ ERROR could not evaluate static initializer
  18 };
  19
  20 fn main() {
  21     println!("{}", unsafe { *FOO.0.get() });
  22 }