add #![feature(never_type)] to tests as needed

src/test/mir-opt/retain-never-const.rs

@@ -5,6 +5,7 @@
 // compile-flags: --emit mir,link
 
 #![feature(const_panic)]
+#![feature(never_type)]
 
 struct PrintName<T>(T);
 

src/test/ui/consts/const-eval/index-out-of-bounds-never-type.rs

@@ -1,5 +1,6 @@
 // Regression test for #66975
 #![warn(const_err)]
+#![feature(never_type)]
 
 struct PrintName<T>(T);
 

src/test/ui/consts/const-eval/index-out-of-bounds-never-type.stderr

@@ -1,5 +1,5 @@
 warning: any use of this value will cause an error
-  --> $DIR/index-out-of-bounds-never-type.rs:7:61
+  --> $DIR/index-out-of-bounds-never-type.rs:8:61
    |
 LL |     const VOID: ! = { let x = 0 * std::mem::size_of::<T>(); [][x] };
    |     --------------------------------------------------------^^^^^---
@@ -13,7 +13,7 @@ LL | #![warn(const_err)]
    |         ^^^^^^^^^
 
 error: erroneous constant encountered
-  --> $DIR/index-out-of-bounds-never-type.rs:12:13
+  --> $DIR/index-out-of-bounds-never-type.rs:13:13
    |
 LL |     let _ = PrintName::<T>::VOID;
    |             ^^^^^^^^^^^^^^^^^^^^

src/test/ui/consts/const-eval/panic-assoc-never-type.rs

@@ -1,6 +1,7 @@
 // Regression test for #66975
 #![warn(const_err)]
 #![feature(const_panic)]
+#![feature(never_type)]
 
 struct PrintName;
 

src/test/ui/consts/const-eval/panic-assoc-never-type.stderr

@@ -1,10 +1,10 @@
 warning: any use of this value will cause an error
-  --> $DIR/panic-assoc-never-type.rs:8:21
+  --> $DIR/panic-assoc-never-type.rs:9:21
    |
 LL |     const VOID: ! = panic!();
    |     ----------------^^^^^^^^-
    |                     |
-   |                     the evaluated program panicked at 'explicit panic', $DIR/panic-assoc-never-type.rs:8:21
+   |                     the evaluated program panicked at 'explicit panic', $DIR/panic-assoc-never-type.rs:9:21
    |
 note: lint level defined here
   --> $DIR/panic-assoc-never-type.rs:2:9
@@ -14,7 +14,7 @@ LL | #![warn(const_err)]
    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0080]: erroneous constant used
-  --> $DIR/panic-assoc-never-type.rs:13:13
+  --> $DIR/panic-assoc-never-type.rs:14:13
    |
 LL |     let _ = PrintName::VOID;
    |             ^^^^^^^^^^^^^^^ referenced constant has errors

src/test/ui/consts/const-eval/panic-never-type.rs

@@ -1,6 +1,7 @@
 // Regression test for #66975
 #![warn(const_err)]
 #![feature(const_panic)]
+#![feature(never_type)]
 
 const VOID: ! = panic!();
 //~^ WARN any use of this value will cause an error

src/test/ui/consts/const-eval/panic-never-type.stderr

@@ -1,10 +1,10 @@
 warning: any use of this value will cause an error
-  --> $DIR/panic-never-type.rs:5:17
+  --> $DIR/panic-never-type.rs:6:17
    |
 LL | const VOID: ! = panic!();
    | ----------------^^^^^^^^-
    |                 |
-   |                 the evaluated program panicked at 'explicit panic', $DIR/panic-never-type.rs:5:17
+   |                 the evaluated program panicked at 'explicit panic', $DIR/panic-never-type.rs:6:17
    |
 note: lint level defined here
   --> $DIR/panic-never-type.rs:2:9
@@ -14,7 +14,7 @@ LL | #![warn(const_err)]
    = note: this warning originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
 
 error[E0080]: erroneous constant used
-  --> $DIR/panic-never-type.rs:9:13
+  --> $DIR/panic-never-type.rs:10:13
    |
 LL |     let _ = VOID;
    |             ^^^^ referenced constant has errors

src/test/ui/loops/loop-break-value.stderr

@@ -29,7 +29,7 @@ LL |             break;
    |             ^^^^^
 
 error[E0571]: `break` with value from a `while` loop
-  --> $DIR/loop-break-value.rs:36:12
+  --> $DIR/loop-break-value.rs:38:12
    |
 LL |         if break () {
    |            ^^^^^^^^ can only break with a value inside `loop` or breakable block
@@ -40,7 +40,7 @@ LL |         if break {
    |            ^^^^^
 
 error[E0571]: `break` with value from a `while` loop
-  --> $DIR/loop-break-value.rs:41:9
+  --> $DIR/loop-break-value.rs:43:9
    |
 LL |         break None;
    |         ^^^^^^^^^^ can only break with a value inside `loop` or breakable block
@@ -51,7 +51,7 @@ LL |         break;
    |         ^^^^^
 
 error[E0571]: `break` with value from a `while` loop
-  --> $DIR/loop-break-value.rs:47:13
+  --> $DIR/loop-break-value.rs:49:13
    |
 LL |             break 'while_let_loop "nope";
    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can only break with a value inside `loop` or breakable block

src/test/ui/never_type/auto-traits.rs

@@ -1,6 +1,7 @@
 // check-pass
 
 #![feature(optin_builtin_traits)]
+#![feature(never_type)]
 
 fn main() {
     enum Void {}