src/test/ui/unsafe/issue-45107-unnecessary-unsafe-in-closure.rs

   1 // revisions: mir thir
   2 // [thir]compile-flags: -Zthir-unsafeck
   3
   4 #[deny(unused_unsafe)]
   5 fn main() {
   6     let mut v = Vec::<i32>::with_capacity(24);
   7
   8     unsafe {
   9         let f = |v: &mut Vec<_>| {
  10             unsafe { //~ ERROR unnecessary `unsafe`
  11                 v.set_len(24);
  12                 |w: &mut Vec<u32>| { unsafe { //~ ERROR unnecessary `unsafe`
  13                     w.set_len(32);
  14                 } };
  15             }
  16             |x: &mut Vec<u32>| { unsafe { //~ ERROR unnecessary `unsafe`
  17                 x.set_len(40);
  18             } };
  19         };
  20
  21         v.set_len(0);
  22         f(&mut v);
  23     }
  24
  25     |y: &mut Vec<u32>| { unsafe {
  26         y.set_len(48);
  27     } };
  28 }