Emit a hard error when a panic occurs during const-eval

Previous, a panic during const evaluation would go through the
`const_err` lint. This PR ensures that such a panic always causes
compilation to fail.

13 files changed, 56 insertions, 128 deletions

diff --git a/src/test/ui/consts/const-eval/const_panic.rs b/src/test/ui/consts/const-eval/const_panic.rs
index 8ae8376ae4a..b33b1475a22 100644
--- a/src/test/ui/consts/const-eval/const_panic.rs
+++ b/src/test/ui/consts/const-eval/const_panic.rs
@@ -6,40 +6,30 @@ const MSG: &str = "hello";
 
 const Z: () = std::panic!("cheese");
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Z2: () = std::panic!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Y: () = std::unreachable!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const X: () = std::unimplemented!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 //
 const W: () = std::panic!(MSG);
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Z_CORE: () = core::panic!("cheese");
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Z2_CORE: () = core::panic!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Y_CORE: () = core::unreachable!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const X_CORE: () = core::unimplemented!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const W_CORE: () = core::panic!(MSG);
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
diff --git a/src/test/ui/consts/const-eval/const_panic.stderr b/src/test/ui/consts/const-eval/const_panic.stderr
index 5637de8b313..3c890f78af7 100644
--- a/src/test/ui/consts/const-eval/const_panic.stderr
+++ b/src/test/ui/consts/const-eval/const_panic.stderr
@@ -1,4 +1,4 @@
-error: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $DIR/const_panic.rs:7:15
    |
 LL | const Z: () = std::panic!("cheese");
@@ -6,118 +6,98 @@ LL | const Z: () = std::panic!("cheese");
    |               |
    |               the evaluated program panicked at 'cheese', $DIR/const_panic.rs:7:15
    |
-   = note: `#[deny(const_err)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:11:16
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:10:16
    |
 LL | const Z2: () = std::panic!();
    | ---------------^^^^^^^^^^^^^-
    |                |
-   |                the evaluated program panicked at 'explicit panic', $DIR/const_panic.rs:11:16
+   |                the evaluated program panicked at 'explicit panic', $DIR/const_panic.rs:10:16
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:15:15
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:13:15
    |
 LL | const Y: () = std::unreachable!();
    | --------------^^^^^^^^^^^^^^^^^^^-
    |               |
-   |               the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic.rs:15:15
+   |               the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic.rs:13:15
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:19:15
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:16:15
    |
 LL | const X: () = std::unimplemented!();
    | --------------^^^^^^^^^^^^^^^^^^^^^-
    |               |
-   |               the evaluated program panicked at 'not implemented', $DIR/const_panic.rs:19:15
+   |               the evaluated program panicked at 'not implemented', $DIR/const_panic.rs:16:15
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:23:15
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:19:15
    |
 LL | const W: () = std::panic!(MSG);
    | --------------^^^^^^^^^^^^^^^^-
    |               |
-   |               the evaluated program panicked at 'hello', $DIR/const_panic.rs:23:15
+   |               the evaluated program panicked at 'hello', $DIR/const_panic.rs:19:15
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:27:20
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:22:20
    |
 LL | const Z_CORE: () = core::panic!("cheese");
    | -------------------^^^^^^^^^^^^^^^^^^^^^^-
    |                    |
-   |                    the evaluated program panicked at 'cheese', $DIR/const_panic.rs:27:20
+   |                    the evaluated program panicked at 'cheese', $DIR/const_panic.rs:22:20
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:31:21
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:25:21
    |
 LL | const Z2_CORE: () = core::panic!();
    | --------------------^^^^^^^^^^^^^^-
    |                     |
-   |                     the evaluated program panicked at 'explicit panic', $DIR/const_panic.rs:31:21
+   |                     the evaluated program panicked at 'explicit panic', $DIR/const_panic.rs:25:21
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:35:20
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:28:20
    |
 LL | const Y_CORE: () = core::unreachable!();
    | -------------------^^^^^^^^^^^^^^^^^^^^-
    |                    |
-   |                    the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic.rs:35:20
+   |                    the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic.rs:28:20
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:39:20
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:31:20
    |
 LL | const X_CORE: () = core::unimplemented!();
    | -------------------^^^^^^^^^^^^^^^^^^^^^^-
    |                    |
-   |                    the evaluated program panicked at 'not implemented', $DIR/const_panic.rs:39:20
+   |                    the evaluated program panicked at 'not implemented', $DIR/const_panic.rs:31:20
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic.rs:43:20
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic.rs:34:20
    |
 LL | const W_CORE: () = core::panic!(MSG);
    | -------------------^^^^^^^^^^^^^^^^^-
    |                    |
-   |                    the evaluated program panicked at 'hello', $DIR/const_panic.rs:43:20
+   |                    the evaluated program panicked at 'hello', $DIR/const_panic.rs:34:20
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 10 previous errors
 
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/const_panic_libcore_bin.rs b/src/test/ui/consts/const-eval/const_panic_libcore_bin.rs
index 0eb1e3eb94e..6b03e847def 100644
--- a/src/test/ui/consts/const-eval/const_panic_libcore_bin.rs
+++ b/src/test/ui/consts/const-eval/const_panic_libcore_bin.rs
@@ -8,15 +8,12 @@ use core::panic::PanicInfo;
 
 const Z: () = panic!("cheese");
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const Y: () = unreachable!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 const X: () = unimplemented!();
 //~^ ERROR any use of this value will cause an error
-//~| WARN this was previously accepted by the compiler but is being phased out
 
 #[lang = "eh_personality"]
 fn eh() {}
diff --git a/src/test/ui/consts/const-eval/const_panic_libcore_bin.stderr b/src/test/ui/consts/const-eval/const_panic_libcore_bin.stderr
index 9971559e33b..2a3ad3ca180 100644
--- a/src/test/ui/consts/const-eval/const_panic_libcore_bin.stderr
+++ b/src/test/ui/consts/const-eval/const_panic_libcore_bin.stderr
@@ -1,4 +1,4 @@
-error: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $DIR/const_panic_libcore_bin.rs:9:15
    |
 LL | const Z: () = panic!("cheese");
@@ -6,34 +6,28 @@ LL | const Z: () = panic!("cheese");
    |               |
    |               the evaluated program panicked at 'cheese', $DIR/const_panic_libcore_bin.rs:9:15
    |
-   = note: `#[deny(const_err)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic_libcore_bin.rs:13:15
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic_libcore_bin.rs:12:15
    |
 LL | const Y: () = unreachable!();
    | --------------^^^^^^^^^^^^^^-
    |               |
-   |               the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic_libcore_bin.rs:13:15
+   |               the evaluated program panicked at 'internal error: entered unreachable code', $DIR/const_panic_libcore_bin.rs:12:15
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: any use of this value will cause an error
-  --> $DIR/const_panic_libcore_bin.rs:17:15
+error[E0080]: any use of this value will cause an error
+  --> $DIR/const_panic_libcore_bin.rs:15:15
    |
 LL | const X: () = unimplemented!();
    | --------------^^^^^^^^^^^^^^^^-
    |               |
-   |               the evaluated program panicked at 'not implemented', $DIR/const_panic_libcore_bin.rs:17:15
+   |               the evaluated program panicked at 'not implemented', $DIR/const_panic_libcore_bin.rs:15:15
    |
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to 3 previous errors
 
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/panic-assoc-never-type.rs b/src/test/ui/consts/const-eval/panic-assoc-never-type.rs
index f76440298b3..dd18a98035b 100644
--- a/src/test/ui/consts/const-eval/panic-assoc-never-type.rs
+++ b/src/test/ui/consts/const-eval/panic-assoc-never-type.rs
@@ -9,8 +9,7 @@ struct PrintName;
 
 impl PrintName {
     const VOID: ! = panic!();
-    //~^ WARN any use of this value will cause an error
-    //~| WARN this was previously accepted by the compiler but is being phased out
+    //~^ ERROR any use of this value will cause an error
 }
 
 fn main() {
diff --git a/src/test/ui/consts/const-eval/panic-assoc-never-type.stderr b/src/test/ui/consts/const-eval/panic-assoc-never-type.stderr
index d1f067df848..e186240f53a 100644
--- a/src/test/ui/consts/const-eval/panic-assoc-never-type.stderr
+++ b/src/test/ui/consts/const-eval/panic-assoc-never-type.stderr
@@ -1,4 +1,4 @@
-warning: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $DIR/panic-assoc-never-type.rs:11:21
    |
 LL |     const VOID: ! = panic!();
@@ -6,21 +6,14 @@ LL |     const VOID: ! = panic!();
    |                     |
    |                     the evaluated program panicked at 'explicit panic', $DIR/panic-assoc-never-type.rs:11:21
    |
-note: the lint level is defined here
-  --> $DIR/panic-assoc-never-type.rs:4:9
-   |
-LL | #![warn(const_err)]
-   |         ^^^^^^^^^
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
-   = note: this warning originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
+   = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error[E0080]: erroneous constant used
-  --> $DIR/panic-assoc-never-type.rs:17:13
+  --> $DIR/panic-assoc-never-type.rs:16:13
    |
 LL |     let _ = PrintName::VOID;
    |             ^^^^^^^^^^^^^^^ referenced constant has errors
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to 2 previous errors
 
 For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/panic-never-type.rs b/src/test/ui/consts/const-eval/panic-never-type.rs
index c5139c575b1..71b489d828c 100644
--- a/src/test/ui/consts/const-eval/panic-never-type.rs
+++ b/src/test/ui/consts/const-eval/panic-never-type.rs
@@ -1,15 +1,11 @@
-// build-fail
-
 // 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
-//~| WARN this was previously accepted by the compiler but is being phased out
+//~^ ERROR any use of this value will cause an error
 
 fn main() {
     let _ = VOID;
-    //~^ ERROR erroneous constant used
 }
diff --git a/src/test/ui/consts/const-eval/panic-never-type.stderr b/src/test/ui/consts/const-eval/panic-never-type.stderr
index 2217bf1e05a..2254c3dcfdf 100644
--- a/src/test/ui/consts/const-eval/panic-never-type.stderr
+++ b/src/test/ui/consts/const-eval/panic-never-type.stderr
@@ -1,26 +1,13 @@
-warning: any use of this value will cause an error
-  --> $DIR/panic-never-type.rs:8:17
+error[E0080]: any use of this value will cause an error
+  --> $DIR/panic-never-type.rs:6:17
    |
 LL | const VOID: ! = panic!();
    | ----------------^^^^^^^^-
    |                 |
-   |                 the evaluated program panicked at 'explicit panic', $DIR/panic-never-type.rs:8:17
+   |                 the evaluated program panicked at 'explicit panic', $DIR/panic-never-type.rs:6:17
    |
-note: the lint level is defined here
-  --> $DIR/panic-never-type.rs:4:9
-   |
-LL | #![warn(const_err)]
-   |         ^^^^^^^^^
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
-   = note: this warning originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
-
-error[E0080]: erroneous constant used
-  --> $DIR/panic-never-type.rs:13:13
-   |
-LL |     let _ = VOID;
-   |             ^^^^ referenced constant has errors
+   = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-eval/unwind-abort.rs b/src/test/ui/consts/const-eval/unwind-abort.rs
index 10820986fa7..9bc63d9328c 100644
--- a/src/test/ui/consts/const-eval/unwind-abort.rs
+++ b/src/test/ui/consts/const-eval/unwind-abort.rs
@@ -2,8 +2,7 @@
 
 #[unwind(aborts)]
 const fn foo() {
-    panic!() //~ ERROR any use of this value will cause an error [const_err]
-    //~| WARN this was previously accepted by the compiler but is being phased out
+    panic!() //~ ERROR any use of this value will cause an error
 }
 
 const _: () = foo();
diff --git a/src/test/ui/consts/const-eval/unwind-abort.stderr b/src/test/ui/consts/const-eval/unwind-abort.stderr
index 79fdd05be30..b41d786169b 100644
--- a/src/test/ui/consts/const-eval/unwind-abort.stderr
+++ b/src/test/ui/consts/const-eval/unwind-abort.stderr
@@ -1,4 +1,4 @@
-error: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $DIR/unwind-abort.rs:5:5
    |
 LL |     panic!()
@@ -6,15 +6,13 @@ LL |     panic!()
    |     |
    |     the evaluated program panicked at 'explicit panic', $DIR/unwind-abort.rs:5:5
    |     inside `foo` at $SRC_DIR/std/src/panic.rs:LL:COL
-   |     inside `_` at $DIR/unwind-abort.rs:9:15
+   |     inside `_` at $DIR/unwind-abort.rs:8:15
 ...
 LL | const _: () = foo();
    | --------------------
    |
-   = note: `#[deny(const_err)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/const-unwrap.stderr b/src/test/ui/consts/const-unwrap.stderr
index 0100dce5a96..95f4711cb65 100644
--- a/src/test/ui/consts/const-unwrap.stderr
+++ b/src/test/ui/consts/const-unwrap.stderr
@@ -1,4 +1,4 @@
-error: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $SRC_DIR/core/src/option.rs:LL:COL
    |
 LL |             None => panic!("called `Option::unwrap()` on a `None` value"),
@@ -13,10 +13,8 @@ LL |             None => panic!("called `Option::unwrap()` on a `None` value"),
 LL | const BAR: i32 = Option::<i32>::None.unwrap();
    | ----------------------------------------------
    |
-   = note: `#[deny(const_err)]` on by default
-   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
-   = note: for more information, see issue #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `$crate::panic::panic_2015` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/control-flow/assert.const_panic.stderr b/src/test/ui/consts/control-flow/assert.const_panic.stderr
index 665b4240011..8e1a2b5eb46 100644
--- a/src/test/ui/consts/control-flow/assert.const_panic.stderr
+++ b/src/test/ui/consts/control-flow/assert.const_panic.stderr
@@ -1,4 +1,4 @@
-error: any use of this value will cause an error
+error[E0080]: any use of this value will cause an error
   --> $DIR/assert.rs:10:15
    |
 LL | const _: () = assert!(false);
@@ -6,10 +6,8 @@ LL | const _: () = assert!(false);
    |               |
    |               the evaluated program panicked at 'assertion failed: false', $DIR/assert.rs:10:15
    |
-   = note: `#[deny(const_err)]` on by default
-   = 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 #71800 <https://github.com/rust-lang/rust/issues/71800>
    = note: this error originates in the macro `assert` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: aborting due to previous error
 
+For more information about this error, try `rustc --explain E0080`.
diff --git a/src/test/ui/consts/control-flow/assert.rs b/src/test/ui/consts/control-flow/assert.rs
index a21f28604bd..90017fee193 100644
--- a/src/test/ui/consts/control-flow/assert.rs
+++ b/src/test/ui/consts/control-flow/assert.rs
@@ -10,6 +10,5 @@ const _: () = assert!(true);
 const _: () = assert!(false);
 //[stock]~^ ERROR panicking in constants is unstable
 //[const_panic]~^^ ERROR any use of this value will cause an error
-//[const_panic]~| WARN this was previously accepted by the compiler but is being phased out
 
 fn main() {}