Auto merge of #4240 - alex:uninit-intrinsic-prep, r=Manishearth

Removed use of intrinsics::uninit from tests.

This is in preperation for rust-lang/rust#62150

Also allows deprecations in preperations for intrinsics::init being deprecated, which is a planned future step.

changelog: none

Author: bors

tests/ui/invalid_ref.rs

@@ -1,8 +1,8 @@
-#![allow(unused)]
+#![allow(deprecated, unused)]
 #![feature(core_intrinsics)]
 
 extern crate core;
-use std::intrinsics::{init, uninit};
+use std::intrinsics::init;
 
 fn main() {
     let x = 1;
@@ -12,7 +12,6 @@ fn main() {
         ref_to_zeroed_intr(&x);
         ref_to_uninit_std(&x);
         ref_to_uninit_core(&x);
-        ref_to_uninit_intr(&x);
         some_ref();
         std_zeroed_no_ref();
         core_zeroed_no_ref();
@@ -40,10 +39,6 @@ unsafe fn ref_to_uninit_core<T: ?Sized>(t: &T) {
     let ref_uninit: &T = core::mem::uninitialized(); // warning
 }
 
-unsafe fn ref_to_uninit_intr<T: ?Sized>(t: &T) {
-    let ref_uninit: &T = std::intrinsics::uninit(); // warning
-}
-
 fn some_ref() {
     let some_ref = &1;
 }

tests/ui/invalid_ref.stderr

@@ -1,5 +1,5 @@
 error: reference to zeroed memory
-  --> $DIR/invalid_ref.rs:24:24
+  --> $DIR/invalid_ref.rs:23:24
    |
 LL |     let ref_zero: &T = std::mem::zeroed(); // warning
    |                        ^^^^^^^^^^^^^^^^^^
@@ -8,44 +8,36 @@ LL |     let ref_zero: &T = std::mem::zeroed(); // warning
    = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
 
 error: reference to zeroed memory
-  --> $DIR/invalid_ref.rs:28:24
+  --> $DIR/invalid_ref.rs:27:24
    |
 LL |     let ref_zero: &T = core::mem::zeroed(); // warning
    |                        ^^^^^^^^^^^^^^^^^^^
    |
    = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
 
 error: reference to zeroed memory
-  --> $DIR/invalid_ref.rs:32:24
+  --> $DIR/invalid_ref.rs:31:24
    |
 LL |     let ref_zero: &T = std::intrinsics::init(); // warning
    |                        ^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
 
 error: reference to uninitialized memory
-  --> $DIR/invalid_ref.rs:36:26
+  --> $DIR/invalid_ref.rs:35:26
    |
 LL |     let ref_uninit: &T = std::mem::uninitialized(); // warning
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
 
 error: reference to uninitialized memory
-  --> $DIR/invalid_ref.rs:40:26
+  --> $DIR/invalid_ref.rs:39:26
    |
 LL |     let ref_uninit: &T = core::mem::uninitialized(); // warning
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
 
-error: reference to uninitialized memory
-  --> $DIR/invalid_ref.rs:44:26
-   |
-LL |     let ref_uninit: &T = std::intrinsics::uninit(); // warning
-   |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = help: Creation of a null reference is undefined behavior; see https://doc.rust-lang.org/reference/behavior-considered-undefined.html
-
-error: aborting due to 6 previous errors
+error: aborting due to 5 previous errors