tests/codegen/vecdeque_no_panic.rs

   1 // This test checks that `VecDeque::front[_mut]()` and `VecDeque::back[_mut]()` can't panic.
   2
   3 // compile-flags: -O
   4 // ignore-debug: the debug assertions get in the way
   5
   6 #![crate_type = "lib"]
   7
   8 use std::collections::VecDeque;
   9
  10 // CHECK-LABEL: @dont_panic
  11 #[no_mangle]
  12 pub fn dont_panic(v: &mut VecDeque<usize>) {
  13     // CHECK-NOT: expect
  14     // CHECK-NOT: panic
  15     v.front();
  16     v.front_mut();
  17     v.back();
  18     v.back_mut();
  19 }