error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:14:9
   |
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:17:11
   |
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:23:9
   |
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:28:9
   |
LL |     use std::{
   |         ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:35:15
   |
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:37:21
   |
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:41:16
   |
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:43:27
   |
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:48:9
   |
LL |     use std::error::Error;
   |         ^^^ help: consider importing the item from `core`: `core`

error: used import from `std` instead of `core`
  --> tests/ui/std_instead_of_core.rs:52:9
   |
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:59:9
   |
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:61:9
   |
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:67:9
   |
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 13 previous errors