error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:15:9
   |
LL |     use std::hash::Hasher;
   |         ^^^ help: consider importing the item from `core`: `core`
   |
   = note: `-D clippy::std-instead-of-core` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_core)]`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:18:11
   |
LL |     use ::std::hash::Hash;
   |           ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:24:9
   |
LL |     use std::fmt::{Debug, Result};
   |         ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:28:15
   |
LL |     let ptr = std::ptr::null::<u32>();
   |               ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:30:21
   |
LL |     let ptr_mut = ::std::ptr::null_mut::<usize>();
   |                     ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:34:16
   |
LL |     let cell = std::cell::Cell::new(8u32);
   |                ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:36:27
   |
LL |     let cell_absolute = ::std::cell::Cell::new(8u32);
   |                           ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:45:9
   |
LL |     use std::iter::Iterator;
   |         ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `alloc`
  --> tests/ui/std_instead_of_core.rs:52:9
   |
LL |     use std::vec;
   |         ^^^ help: consider importing the item from `alloc`: `alloc`
   |
   = note: `-D clippy::std-instead-of-alloc` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::std_instead_of_alloc)]`

error: used import from `std` instead of `alloc`
  --> tests/ui/std_instead_of_core.rs:54:9
   |
LL |     use std::vec::Vec;
   |         ^^^ help: consider importing the item from `alloc`: `alloc`

error: used import from `alloc` instead of `core`
  --> tests/ui/std_instead_of_core.rs:60:9
   |
LL |     use alloc::slice::from_ref;
   |         ^^^^^ help: consider importing the item from `core`: `core`
   |
   = note: `-D clippy::alloc-instead-of-core` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::alloc_instead_of_core)]`

error: aborting due to 11 previous errors