consolidate miri-unleashed tests for mutable refs into one file

tests/ui/consts/miri_unleashed/mutable_references.rs

@@ -2,13 +2,20 @@
 //@ normalize-stderr-test: "(the raw bytes of the constant) \(size: [0-9]*, align: [0-9]*\)" -> "$1 (size: $$SIZE, align: $$ALIGN)"
 //@ normalize-stderr-test: "([0-9a-f][0-9a-f] |╾─*ALLOC[0-9]+(\+[a-z0-9]+)?(<imm>)?─*╼ )+ *│.*" -> "HEX_DUMP"
 
+#![allow(static_mut_refs)]
 #![deny(const_eval_mutable_ptr_in_final_value)]
 use std::cell::UnsafeCell;
+use std::sync::atomic::*;
+
+// # Plain `&mut` in the final value
 
 // This requires walking nested statics.
 static FOO: &&mut u32 = &&mut 42;
 //~^ ERROR it is undefined behavior to use this value
-
+//~| pointing to read-only memory
+static OH_YES: &mut i32 = &mut 42;
+//~^ ERROR it is undefined behavior to use this value
+//~| pointing to read-only memory
 static BAR: &mut () = &mut ();
 //~^ ERROR encountered mutable pointer in final value of static
 //~| WARNING this was previously accepted by the compiler
@@ -19,15 +26,92 @@ static BOO: &mut Foo<()> = &mut Foo(());
 //~^ ERROR encountered mutable pointer in final value of static
 //~| WARNING this was previously accepted by the compiler
 
+const BLUNT: &mut i32 = &mut 42;
+//~^ ERROR: it is undefined behavior to use this value
+//~| pointing to read-only memory
+
+const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
+//~^ ERROR: it is undefined behavior to use this value
+//~| static
+
+// # Interior mutability
+
 struct Meh {
     x: &'static UnsafeCell<i32>,
 }
 unsafe impl Sync for Meh {}
 static MEH: Meh = Meh { x: &UnsafeCell::new(42) };
 //~^ ERROR it is undefined behavior to use this value
+//~| `UnsafeCell` in read-only memory
+// Same with a const:
+// the following will never be ok! no interior mut behind consts, because
+// all allocs interned here will be marked immutable.
+const MUH: Meh = Meh {
+    //~^ ERROR it is undefined behavior to use this value
+    //~| `UnsafeCell` in read-only memory
+    x: &UnsafeCell::new(42),
+};
+
+struct Synced {
+    x: UnsafeCell<i32>,
+}
+unsafe impl Sync for Synced {}
+
+// Make sure we also catch this behind a type-erased `dyn Trait` reference.
+const SNEAKY: &dyn Sync = &Synced { x: UnsafeCell::new(42) };
+//~^ ERROR: it is undefined behavior to use this value
+//~| `UnsafeCell` in read-only memory
+
+// # Check for mutable references to read-only memory
+
+static READONLY: i32 = 0;
+static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
+//~^ ERROR: it is undefined behavior to use this value
+//~| pointing to read-only memory
+
+// # Check for consts pointing to mutable memory
+
+static mut MUTABLE: i32 = 42;
+const POINTS_TO_MUTABLE: &i32 = unsafe { &MUTABLE }; //~ERROR: undefined behavior
+//~| encountered reference to mutable memory
+static mut MUTABLE_REF: &mut i32 = &mut 42;
+const POINTS_TO_MUTABLE2: &i32 = unsafe { &*MUTABLE_REF };
+//~^ ERROR: evaluation of constant value failed
+//~| accesses mutable global memory
+
+const POINTS_TO_MUTABLE_INNER: *const i32 = &mut 42 as *mut _ as *const _;
+//~^ ERROR: mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
+
+const POINTS_TO_MUTABLE_INNER2: *const i32 = &mut 42 as *const _;
+//~^ ERROR: mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
+
+const INTERIOR_MUTABLE_BEHIND_RAW: *mut i32 = &UnsafeCell::new(42) as *const _ as *mut _;
+//~^ ERROR: mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
+
+struct SyncPtr<T> {
+    x: *const T,
+}
+unsafe impl<T> Sync for SyncPtr<T> {}
+
+// These pass the lifetime checks because of the "tail expression" / "outer scope" rule.
+// (This relies on `SyncPtr` being a curly brace struct.)
+// However, we intern the inner memory as read-only, so this must be rejected.
+// (Also see `static-no-inner-mut` for similar tests on `static`.)
+const RAW_SYNC: SyncPtr<AtomicI32> = SyncPtr { x: &AtomicI32::new(42) };
+//~^ ERROR mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
+
+const RAW_MUT_CAST: SyncPtr<i32> = SyncPtr { x: &mut 42 as *mut _ as *const _ };
+//~^ ERROR mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
+
+const RAW_MUT_COERCE: SyncPtr<i32> = SyncPtr { x: &mut 0 };
+//~^ ERROR mutable pointer in final value
+//~| WARNING this was previously accepted by the compiler
 
-static OH_YES: &mut i32 = &mut 42;
-//~^ ERROR it is undefined behavior to use this value
 
 fn main() {
     unsafe {

tests/ui/consts/miri_unleashed/mutable_references.stderr

@@ -1,5 +1,5 @@
 error[E0080]: it is undefined behavior to use this value
-  --> $DIR/mutable_references.rs:9:1
+  --> $DIR/mutable_references.rs:13:1
    |
 LL | static FOO: &&mut u32 = &&mut 42;
    | ^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>: encountered mutable reference or box pointing to read-only memory
@@ -9,22 +9,33 @@ LL | static FOO: &&mut u32 = &&mut 42;
                HEX_DUMP
            }
 
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:16:1
+   |
+LL | static OH_YES: &mut i32 = &mut 42;
+   | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered mutable reference or box pointing to read-only memory
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
 error: encountered mutable pointer in final value of static
-  --> $DIR/mutable_references.rs:12:1
+  --> $DIR/mutable_references.rs:19:1
    |
 LL | static BAR: &mut () = &mut ();
    | ^^^^^^^^^^^^^^^^^^^
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
 note: the lint level is defined here
-  --> $DIR/mutable_references.rs:5:9
+  --> $DIR/mutable_references.rs:6:9
    |
 LL | #![deny(const_eval_mutable_ptr_in_final_value)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 error: encountered mutable pointer in final value of static
-  --> $DIR/mutable_references.rs:18:1
+  --> $DIR/mutable_references.rs:25:1
    |
 LL | static BOO: &mut Foo<()> = &mut Foo(());
    | ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -33,7 +44,29 @@ LL | static BOO: &mut Foo<()> = &mut Foo(());
    = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
 
 error[E0080]: it is undefined behavior to use this value
-  --> $DIR/mutable_references.rs:26:1
+  --> $DIR/mutable_references.rs:29:1
+   |
+LL | const BLUNT: &mut i32 = &mut 42;
+   | ^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered mutable reference or box pointing to read-only memory
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:33:1
+   |
+LL | const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
+   | ^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered reference to mutable memory in `const`
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:43:1
    |
 LL | static MEH: Meh = Meh { x: &UnsafeCell::new(42) };
    | ^^^^^^^^^^^^^^^ constructing invalid value at .x.<deref>: encountered `UnsafeCell` in read-only memory
@@ -44,80 +77,338 @@ LL | static MEH: Meh = Meh { x: &UnsafeCell::new(42) };
            }
 
 error[E0080]: it is undefined behavior to use this value
-  --> $DIR/mutable_references.rs:29:1
+  --> $DIR/mutable_references.rs:49:1
    |
-LL | static OH_YES: &mut i32 = &mut 42;
-   | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered mutable reference or box pointing to read-only memory
+LL | const MUH: Meh = Meh {
+   | ^^^^^^^^^^^^^^ constructing invalid value at .x.<deref>: encountered `UnsafeCell` in read-only memory
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:61:1
+   |
+LL | const SNEAKY: &dyn Sync = &Synced { x: UnsafeCell::new(42) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value at .<deref>.<dyn-downcast>.x: encountered `UnsafeCell` in read-only memory
    |
    = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
    = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
                HEX_DUMP
            }
 
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:68:1
+   |
+LL | static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered mutable reference or box pointing to read-only memory
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
+error[E0080]: it is undefined behavior to use this value
+  --> $DIR/mutable_references.rs:75:1
+   |
+LL | const POINTS_TO_MUTABLE: &i32 = unsafe { &MUTABLE };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ constructing invalid value: encountered reference to mutable memory in `const`
+   |
+   = note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rustc repository if you believe it should not be considered undefined behavior.
+   = note: the raw bytes of the constant (size: $SIZE, align: $ALIGN) {
+               HEX_DUMP
+           }
+
+error[E0080]: evaluation of constant value failed
+  --> $DIR/mutable_references.rs:78:43
+   |
+LL | const POINTS_TO_MUTABLE2: &i32 = unsafe { &*MUTABLE_REF };
+   |                                           ^^^^^^^^^^^^^ constant accesses mutable global memory
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:82:1
+   |
+LL | const POINTS_TO_MUTABLE_INNER: *const i32 = &mut 42 as *mut _ as *const _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:86:1
+   |
+LL | const POINTS_TO_MUTABLE_INNER2: *const i32 = &mut 42 as *const _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:90:1
+   |
+LL | const INTERIOR_MUTABLE_BEHIND_RAW: *mut i32 = &UnsafeCell::new(42) as *const _ as *mut _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:103:1
+   |
+LL | const RAW_SYNC: SyncPtr<AtomicI32> = SyncPtr { x: &AtomicI32::new(42) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:107:1
+   |
+LL | const RAW_MUT_CAST: SyncPtr<i32> = SyncPtr { x: &mut 42 as *mut _ as *const _ };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:111:1
+   |
+LL | const RAW_MUT_COERCE: SyncPtr<i32> = SyncPtr { x: &mut 0 };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+
 error[E0594]: cannot assign to `*OH_YES`, as `OH_YES` is an immutable static item
-  --> $DIR/mutable_references.rs:36:5
+  --> $DIR/mutable_references.rs:120:5
    |
 LL |     *OH_YES = 99;
    |     ^^^^^^^^^^^^ cannot assign
 
 warning: skipping const checks
    |
 help: skipping check that does not even have a feature gate
-  --> $DIR/mutable_references.rs:9:26
+  --> $DIR/mutable_references.rs:13:26
    |
 LL | static FOO: &&mut u32 = &&mut 42;
    |                          ^^^^^^^
 help: skipping check that does not even have a feature gate
-  --> $DIR/mutable_references.rs:12:23
+  --> $DIR/mutable_references.rs:16:27
+   |
+LL | static OH_YES: &mut i32 = &mut 42;
+   |                           ^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:19:23
    |
 LL | static BAR: &mut () = &mut ();
    |                       ^^^^^^^
 help: skipping check that does not even have a feature gate
-  --> $DIR/mutable_references.rs:18:28
+  --> $DIR/mutable_references.rs:25:28
    |
 LL | static BOO: &mut Foo<()> = &mut Foo(());
    |                            ^^^^^^^^^^^^
 help: skipping check that does not even have a feature gate
-  --> $DIR/mutable_references.rs:26:28
+  --> $DIR/mutable_references.rs:29:25
+   |
+LL | const BLUNT: &mut i32 = &mut 42;
+   |                         ^^^^^^^
+help: skipping check for `const_refs_to_static` feature
+  --> $DIR/mutable_references.rs:33:68
+   |
+LL | const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
+   |                                                                    ^^^^^^
+help: skipping check for `const_mut_refs` feature
+  --> $DIR/mutable_references.rs:33:63
+   |
+LL | const SUBTLE: &mut i32 = unsafe { static mut STATIC: i32 = 0; &mut STATIC };
+   |                                                               ^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:43:28
    |
 LL | static MEH: Meh = Meh { x: &UnsafeCell::new(42) };
    |                            ^^^^^^^^^^^^^^^^^^^^
 help: skipping check that does not even have a feature gate
-  --> $DIR/mutable_references.rs:29:27
+  --> $DIR/mutable_references.rs:52:8
    |
-LL | static OH_YES: &mut i32 = &mut 42;
-   |                           ^^^^^^^
+LL |     x: &UnsafeCell::new(42),
+   |        ^^^^^^^^^^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:61:27
+   |
+LL | const SNEAKY: &dyn Sync = &Synced { x: UnsafeCell::new(42) };
+   |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+help: skipping check for `const_mut_refs` feature
+  --> $DIR/mutable_references.rs:68:49
+   |
+LL | static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
+   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+help: skipping check for `const_mut_refs` feature
+  --> $DIR/mutable_references.rs:68:49
+   |
+LL | static mut MUT_TO_READONLY: &mut i32 = unsafe { &mut *(&READONLY as *const _ as *mut _) };
+   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+help: skipping check for `const_refs_to_static` feature
+  --> $DIR/mutable_references.rs:75:43
+   |
+LL | const POINTS_TO_MUTABLE: &i32 = unsafe { &MUTABLE };
+   |                                           ^^^^^^^
+help: skipping check for `const_refs_to_static` feature
+  --> $DIR/mutable_references.rs:78:45
+   |
+LL | const POINTS_TO_MUTABLE2: &i32 = unsafe { &*MUTABLE_REF };
+   |                                             ^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:82:45
+   |
+LL | const POINTS_TO_MUTABLE_INNER: *const i32 = &mut 42 as *mut _ as *const _;
+   |                                             ^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:86:46
+   |
+LL | const POINTS_TO_MUTABLE_INNER2: *const i32 = &mut 42 as *const _;
+   |                                              ^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:90:47
+   |
+LL | const INTERIOR_MUTABLE_BEHIND_RAW: *mut i32 = &UnsafeCell::new(42) as *const _ as *mut _;
+   |                                               ^^^^^^^^^^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:103:51
+   |
+LL | const RAW_SYNC: SyncPtr<AtomicI32> = SyncPtr { x: &AtomicI32::new(42) };
+   |                                                   ^^^^^^^^^^^^^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:107:49
+   |
+LL | const RAW_MUT_CAST: SyncPtr<i32> = SyncPtr { x: &mut 42 as *mut _ as *const _ };
+   |                                                 ^^^^^^^
+help: skipping check that does not even have a feature gate
+  --> $DIR/mutable_references.rs:111:51
+   |
+LL | const RAW_MUT_COERCE: SyncPtr<i32> = SyncPtr { x: &mut 0 };
+   |                                                   ^^^^^^
 
-error: aborting due to 6 previous errors; 1 warning emitted
+error: aborting due to 19 previous errors; 1 warning emitted
 
 Some errors have detailed explanations: E0080, E0594.
 For more information about an error, try `rustc --explain E0080`.
 Future incompatibility report: Future breakage diagnostic:
 error: encountered mutable pointer in final value of static
-  --> $DIR/mutable_references.rs:12:1
+  --> $DIR/mutable_references.rs:19:1
    |
 LL | static BAR: &mut () = &mut ();
    | ^^^^^^^^^^^^^^^^^^^
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
 note: the lint level is defined here
-  --> $DIR/mutable_references.rs:5:9
+  --> $DIR/mutable_references.rs:6:9
    |
 LL | #![deny(const_eval_mutable_ptr_in_final_value)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 Future breakage diagnostic:
 error: encountered mutable pointer in final value of static
-  --> $DIR/mutable_references.rs:18:1
+  --> $DIR/mutable_references.rs:25:1
    |
 LL | static BOO: &mut Foo<()> = &mut Foo(());
    | ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
    = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
 note: the lint level is defined here
-  --> $DIR/mutable_references.rs:5:9
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:82:1
+   |
+LL | const POINTS_TO_MUTABLE_INNER: *const i32 = &mut 42 as *mut _ as *const _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:86:1
+   |
+LL | const POINTS_TO_MUTABLE_INNER2: *const i32 = &mut 42 as *const _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:90:1
+   |
+LL | const INTERIOR_MUTABLE_BEHIND_RAW: *mut i32 = &UnsafeCell::new(42) as *const _ as *mut _;
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:103:1
+   |
+LL | const RAW_SYNC: SyncPtr<AtomicI32> = SyncPtr { x: &AtomicI32::new(42) };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:107:1
+   |
+LL | const RAW_MUT_CAST: SyncPtr<i32> = SyncPtr { x: &mut 42 as *mut _ as *const _ };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
+   |
+LL | #![deny(const_eval_mutable_ptr_in_final_value)]
+   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Future breakage diagnostic:
+error: encountered mutable pointer in final value of constant
+  --> $DIR/mutable_references.rs:111:1
+   |
+LL | const RAW_MUT_COERCE: SyncPtr<i32> = SyncPtr { x: &mut 0 };
+   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   |
+   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
+   = note: for more information, see issue #122153 <https://github.com/rust-lang/rust/issues/122153>
+note: the lint level is defined here
+  --> $DIR/mutable_references.rs:6:9
    |
 LL | #![deny(const_eval_mutable_ptr_in_final_value)]
    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^