error: it is more concise to loop over references to containers instead of using explicit iteration methods
  --> tests/ui/crashes/ice-11230.rs:8:14
   |
LL |     for v in A.iter() {}
   |              ^^^^^^^^ help: to write this more concisely, try: `A`
   |
   = note: `-D clippy::explicit-iter-loop` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::explicit_iter_loop)]`

error: avoid using `collect()` when not needed
  --> tests/ui/crashes/ice-11230.rs:15:7
   |
LL |     w.collect::<Vec<_>>().is_empty();
   |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: replace with: `next().is_none()`
   |
   = note: `-D clippy::needless-collect` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::needless_collect)]`

error: aborting due to 2 previous errors