error: replacing with `mem::uninitialized()`
  --> tests/ui/repl_uninit.rs:15:23
   |
LL |         let taken_v = mem::replace(&mut v, mem::uninitialized());
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::ptr::read(&mut v)`
   |
   = note: `-D clippy::mem-replace-with-uninit` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::mem_replace_with_uninit)]`

error: replacing with `mem::MaybeUninit::uninit().assume_init()`
  --> tests/ui/repl_uninit.rs:23:23
   |
LL |         let taken_v = mem::replace(&mut v, mem::MaybeUninit::uninit().assume_init());
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::ptr::read(&mut v)`

error: replacing with `mem::zeroed()`
  --> tests/ui/repl_uninit.rs:30:23
   |
LL |         let taken_v = mem::replace(&mut v, mem::zeroed());
   |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: consider using a default value or the `take_mut` crate instead

error: replacing with `mem::uninitialized()`
  --> tests/ui/repl_uninit.rs:43:28
   |
LL |     let taken_u = unsafe { mem::replace(uref, mem::uninitialized()) };
   |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: consider using: `std::ptr::read(uref)`

error: aborting due to 4 previous errors