From f37e7375355d64163b26b10359ca7bc0d5fbe384 Mon Sep 17 00:00:00 2001
From: Jake Vossen <jake@vossen.dev>
Date: Mon, 4 Jan 2021 22:35:44 -0700
Subject: [PATCH] fixed const_generics error help

---
 compiler/rustc_typeck/src/check/wfcheck.rs         |  2 +-
 .../array-size-in-generic-struct-param.min.stderr  |  2 +-
 .../const-param-before-other-params.min.stderr     |  4 ++--
 .../const-param-elided-lifetime.min.stderr         | 10 +++++-----
 ...st-param-type-depends-on-const-param.min.stderr |  4 ++--
 .../ui/const-generics/different_byref.min.stderr   |  2 +-
 .../forbid-non-structural_match-types.min.stderr   |  4 ++--
 ...trinsics-type_name-as-const-argument.min.stderr |  2 +-
 ...e-66596-impl-trait-for-str-const-arg.min.stderr |  2 +-
 .../issues/issue-62579-no-match.min.stderr         |  2 +-
 .../const-generics/issues/issue-62878.min.stderr   |  2 +-
 .../issues/issue-63322-forbid-dyn.min.stderr       |  2 +-
 .../issues/issue-68615-adt.min.stderr              |  2 +-
 .../issues/issue-68615-array.min.stderr            |  2 +-
 .../const-generics/issues/issue-71169.min.stderr   |  2 +-
 .../const-generics/issues/issue-73491.min.stderr   |  2 +-
 .../const-generics/issues/issue-74101.min.stderr   |  4 ++--
 .../const-generics/issues/issue-74255.min.stderr   |  2 +-
 .../const-generics/issues/issue-74950.min.stderr   | 10 +++++-----
 .../const-generics/issues/issue-75047.min.stderr   |  2 +-
 .../min_const_generics/complex-types.stderr        | 14 +++++++-------
 .../static-reference-array-const-param.stderr      |  2 +-
 .../transmute-const-param-static-reference.stderr  |  2 +-
 src/test/ui/const-generics/nested-type.min.stderr  |  2 +-
 .../slice-const-param-mismatch.min.stderr          |  4 ++--
 .../ui/const-generics/slice-const-param.min.stderr |  4 ++--
 .../std/const-generics-range.min.stderr            | 12 ++++++------
 .../type-dependent/issue-71348.min.stderr          |  4 ++--
 28 files changed, 54 insertions(+), 54 deletions(-)

diff --git a/compiler/rustc_typeck/src/check/wfcheck.rs b/compiler/rustc_typeck/src/check/wfcheck.rs
index ab41ff372e23..d81d83f60bd1 100644
--- a/compiler/rustc_typeck/src/check/wfcheck.rs
+++ b/compiler/rustc_typeck/src/check/wfcheck.rs
@@ -330,7 +330,7 @@ fn check_param_wf(tcx: TyCtxt<'_>, param: &hir::GenericParam<'_>) {
                             ),
                         )
                         .note("the only supported types are integers, `bool` and `char`")
-                        .help("more complex types are supported with `#[feature(const_generics)]`")
+                        .help("more complex types are supported with `#![feature(const_generics)]`")
                         .emit()
                 }
             };
diff --git a/src/test/ui/const-generics/array-size-in-generic-struct-param.min.stderr b/src/test/ui/const-generics/array-size-in-generic-struct-param.min.stderr
index 7af23103ce70..8f6e56826fa1 100644
--- a/src/test/ui/const-generics/array-size-in-generic-struct-param.min.stderr
+++ b/src/test/ui/const-generics/array-size-in-generic-struct-param.min.stderr
@@ -23,7 +23,7 @@ LL | struct B<const CFG: Config> {
    |                     ^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/const-generics/const-param-before-other-params.min.stderr b/src/test/ui/const-generics/const-param-before-other-params.min.stderr
index 1e49588f1b4e..a9349ce43c94 100644
--- a/src/test/ui/const-generics/const-param-before-other-params.min.stderr
+++ b/src/test/ui/const-generics/const-param-before-other-params.min.stderr
@@ -17,7 +17,7 @@ LL | fn bar<const X: (), 'a>(_: &'a ()) {
    |                 ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `()` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-before-other-params.rs:10:17
@@ -26,7 +26,7 @@ LL | fn foo<const X: (), T>(_: &T) {}
    |                 ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/const-generics/const-param-elided-lifetime.min.stderr b/src/test/ui/const-generics/const-param-elided-lifetime.min.stderr
index 5d3c8f7b2e61..48d33a785aea 100644
--- a/src/test/ui/const-generics/const-param-elided-lifetime.min.stderr
+++ b/src/test/ui/const-generics/const-param-elided-lifetime.min.stderr
@@ -35,7 +35,7 @@ LL | struct A<const N: &u8>;
    |                   ^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static u8` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-elided-lifetime.rs:15:15
@@ -44,7 +44,7 @@ LL | impl<const N: &u8> A<N> {
    |               ^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static u8` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-elided-lifetime.rs:23:15
@@ -53,7 +53,7 @@ LL | impl<const N: &u8> B for A<N> {}
    |               ^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static u8` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-elided-lifetime.rs:27:17
@@ -62,7 +62,7 @@ LL | fn bar<const N: &u8>() {}
    |                 ^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static u8` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-elided-lifetime.rs:18:21
@@ -71,7 +71,7 @@ LL |     fn foo<const M: &u8>(&self) {}
    |                     ^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 10 previous errors
 
diff --git a/src/test/ui/const-generics/const-param-type-depends-on-const-param.min.stderr b/src/test/ui/const-generics/const-param-type-depends-on-const-param.min.stderr
index d63bc2363209..9804363f39a9 100644
--- a/src/test/ui/const-generics/const-param-type-depends-on-const-param.min.stderr
+++ b/src/test/ui/const-generics/const-param-type-depends-on-const-param.min.stderr
@@ -17,7 +17,7 @@ LL | pub struct Dependent<const N: usize, const X: [u8; N]>([(); N]);
    |                                               ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `[u8; _]` is forbidden as the type of a const generic parameter
   --> $DIR/const-param-type-depends-on-const-param.rs:15:35
@@ -26,7 +26,7 @@ LL | pub struct SelfDependent<const N: [u8; N]>;
    |                                   ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 4 previous errors
 
diff --git a/src/test/ui/const-generics/different_byref.min.stderr b/src/test/ui/const-generics/different_byref.min.stderr
index 05720d15404f..93874fb1f5fe 100644
--- a/src/test/ui/const-generics/different_byref.min.stderr
+++ b/src/test/ui/const-generics/different_byref.min.stderr
@@ -5,7 +5,7 @@ LL | struct Const<const V: [usize; 1]> {}
    |                       ^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/forbid-non-structural_match-types.min.stderr b/src/test/ui/const-generics/forbid-non-structural_match-types.min.stderr
index 3912cf577512..80eac994d55c 100644
--- a/src/test/ui/const-generics/forbid-non-structural_match-types.min.stderr
+++ b/src/test/ui/const-generics/forbid-non-structural_match-types.min.stderr
@@ -5,7 +5,7 @@ LL | struct B<const X: A>; // ok
    |                   ^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `C` is forbidden as the type of a const generic parameter
   --> $DIR/forbid-non-structural_match-types.rs:14:19
@@ -14,7 +14,7 @@ LL | struct D<const X: C>;
    |                   ^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error[E0741]: `C` must be annotated with `#[derive(PartialEq, Eq)]` to be used as the type of a const parameter
   --> $DIR/forbid-non-structural_match-types.rs:14:19
diff --git a/src/test/ui/const-generics/intrinsics-type_name-as-const-argument.min.stderr b/src/test/ui/const-generics/intrinsics-type_name-as-const-argument.min.stderr
index 4c2aaef34939..8701d54f5c96 100644
--- a/src/test/ui/const-generics/intrinsics-type_name-as-const-argument.min.stderr
+++ b/src/test/ui/const-generics/intrinsics-type_name-as-const-argument.min.stderr
@@ -14,7 +14,7 @@ LL | trait Trait<const S: &'static str> {}
    |                      ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/issue-66596-impl-trait-for-str-const-arg.min.stderr b/src/test/ui/const-generics/issue-66596-impl-trait-for-str-const-arg.min.stderr
index b6c6e6fe3740..e96b9e703526 100644
--- a/src/test/ui/const-generics/issue-66596-impl-trait-for-str-const-arg.min.stderr
+++ b/src/test/ui/const-generics/issue-66596-impl-trait-for-str-const-arg.min.stderr
@@ -5,7 +5,7 @@ LL | trait Trait<const NAME: &'static str> {
    |                         ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-62579-no-match.min.stderr b/src/test/ui/const-generics/issues/issue-62579-no-match.min.stderr
index a0aee4821c69..5c9387d4012d 100644
--- a/src/test/ui/const-generics/issues/issue-62579-no-match.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-62579-no-match.min.stderr
@@ -5,7 +5,7 @@ LL | fn foo<const T: NoMatch>() -> bool {
    |                 ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-62878.min.stderr b/src/test/ui/const-generics/issues/issue-62878.min.stderr
index 920d7e43b9b7..e4a71fe06186 100644
--- a/src/test/ui/const-generics/issues/issue-62878.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-62878.min.stderr
@@ -11,7 +11,7 @@ LL | fn foo<const N: usize, const A: [u8; N]>() {}
    |                                 ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/issues/issue-63322-forbid-dyn.min.stderr b/src/test/ui/const-generics/issues/issue-63322-forbid-dyn.min.stderr
index 543e4b29a162..2fb38addb2d8 100644
--- a/src/test/ui/const-generics/issues/issue-63322-forbid-dyn.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-63322-forbid-dyn.min.stderr
@@ -5,7 +5,7 @@ LL | fn test<const T: &'static dyn A>() {
    |                  ^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error[E0741]: `&'static (dyn A + 'static)` must be annotated with `#[derive(PartialEq, Eq)]` to be used as the type of a const parameter
   --> $DIR/issue-63322-forbid-dyn.rs:9:18
diff --git a/src/test/ui/const-generics/issues/issue-68615-adt.min.stderr b/src/test/ui/const-generics/issues/issue-68615-adt.min.stderr
index 2de8ada27661..4782b1d98eba 100644
--- a/src/test/ui/const-generics/issues/issue-68615-adt.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-68615-adt.min.stderr
@@ -5,7 +5,7 @@ LL | struct Const<const V: [usize; 0]> {}
    |                       ^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-68615-array.min.stderr b/src/test/ui/const-generics/issues/issue-68615-array.min.stderr
index 0d17b04a5cdd..d0c190b91b04 100644
--- a/src/test/ui/const-generics/issues/issue-68615-array.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-68615-array.min.stderr
@@ -5,7 +5,7 @@ LL | struct Foo<const V: [usize; 0] > {}
    |                     ^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-71169.min.stderr b/src/test/ui/const-generics/issues/issue-71169.min.stderr
index 68ac47460b35..1c6e08adffdf 100644
--- a/src/test/ui/const-generics/issues/issue-71169.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-71169.min.stderr
@@ -11,7 +11,7 @@ LL | fn foo<const LEN: usize, const DATA: [u8; LEN]>() {}
    |                                      ^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/issues/issue-73491.min.stderr b/src/test/ui/const-generics/issues/issue-73491.min.stderr
index aeab9e267728..c8f2e0dadc1a 100644
--- a/src/test/ui/const-generics/issues/issue-73491.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-73491.min.stderr
@@ -5,7 +5,7 @@ LL | fn hoge<const IN: [u32; LEN]>() {}
    |                   ^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-74101.min.stderr b/src/test/ui/const-generics/issues/issue-74101.min.stderr
index 6561183f7cad..a7f0ecf0a269 100644
--- a/src/test/ui/const-generics/issues/issue-74101.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-74101.min.stderr
@@ -5,7 +5,7 @@ LL | fn test<const N: [u8; 1 + 2]>() {}
    |                  ^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `[u8; _]` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74101.rs:9:21
@@ -14,7 +14,7 @@ LL | struct Foo<const N: [u8; 1 + 2]>;
    |                     ^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/issues/issue-74255.min.stderr b/src/test/ui/const-generics/issues/issue-74255.min.stderr
index 2b6aa7dad97e..62ad43974f4d 100644
--- a/src/test/ui/const-generics/issues/issue-74255.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-74255.min.stderr
@@ -5,7 +5,7 @@ LL |     fn ice_struct_fn<const I: IceEnum>() {}
    |                               ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/issues/issue-74950.min.stderr b/src/test/ui/const-generics/issues/issue-74950.min.stderr
index 27393d38c6b1..4e640ff857ea 100644
--- a/src/test/ui/const-generics/issues/issue-74950.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-74950.min.stderr
@@ -5,7 +5,7 @@ LL | struct Outer<const I: Inner>;
    |                       ^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:17:23
@@ -14,7 +14,7 @@ LL | struct Outer<const I: Inner>;
    |                       ^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:17:23
@@ -23,7 +23,7 @@ LL | struct Outer<const I: Inner>;
    |                       ^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:17:23
@@ -32,7 +32,7 @@ LL | struct Outer<const I: Inner>;
    |                       ^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `Inner` is forbidden as the type of a const generic parameter
   --> $DIR/issue-74950.rs:17:23
@@ -41,7 +41,7 @@ LL | struct Outer<const I: Inner>;
    |                       ^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 5 previous errors
 
diff --git a/src/test/ui/const-generics/issues/issue-75047.min.stderr b/src/test/ui/const-generics/issues/issue-75047.min.stderr
index 4ab90dd1ec66..3c1c3ea97b54 100644
--- a/src/test/ui/const-generics/issues/issue-75047.min.stderr
+++ b/src/test/ui/const-generics/issues/issue-75047.min.stderr
@@ -5,7 +5,7 @@ LL | struct Foo<const N: [u8; Bar::<u32>::value()]>;
    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/min_const_generics/complex-types.stderr b/src/test/ui/const-generics/min_const_generics/complex-types.stderr
index 20d498f9c93b..a658a7b39568 100644
--- a/src/test/ui/const-generics/min_const_generics/complex-types.stderr
+++ b/src/test/ui/const-generics/min_const_generics/complex-types.stderr
@@ -5,7 +5,7 @@ LL | struct Foo<const N: [u8; 0]>;
    |                     ^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `()` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:6:21
@@ -14,7 +14,7 @@ LL | struct Bar<const N: ()>;
    |                     ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `No` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:11:21
@@ -23,7 +23,7 @@ LL | struct Fez<const N: No>;
    |                     ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static u8` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:14:21
@@ -32,7 +32,7 @@ LL | struct Faz<const N: &'static u8>;
    |                     ^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `!` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:17:21
@@ -41,7 +41,7 @@ LL | struct Fiz<const N: !>;
    |                     ^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `()` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:20:19
@@ -50,7 +50,7 @@ LL | enum Goo<const N: ()> { A, B }
    |                   ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `()` is forbidden as the type of a const generic parameter
   --> $DIR/complex-types.rs:23:20
@@ -59,7 +59,7 @@ LL | union Boo<const N: ()> { a: () }
    |                    ^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 7 previous errors
 
diff --git a/src/test/ui/const-generics/min_const_generics/static-reference-array-const-param.stderr b/src/test/ui/const-generics/min_const_generics/static-reference-array-const-param.stderr
index 05939b05bba3..647ef5400cb2 100644
--- a/src/test/ui/const-generics/min_const_generics/static-reference-array-const-param.stderr
+++ b/src/test/ui/const-generics/min_const_generics/static-reference-array-const-param.stderr
@@ -5,7 +5,7 @@ LL | fn a<const X: &'static [u32]>() {}
    |               ^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/min_const_generics/transmute-const-param-static-reference.stderr b/src/test/ui/const-generics/min_const_generics/transmute-const-param-static-reference.stderr
index 8724c7e33b1c..d612e0c35a10 100644
--- a/src/test/ui/const-generics/min_const_generics/transmute-const-param-static-reference.stderr
+++ b/src/test/ui/const-generics/min_const_generics/transmute-const-param-static-reference.stderr
@@ -5,7 +5,7 @@ LL | struct Const<const P: &'static ()>;
    |                       ^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to previous error
 
diff --git a/src/test/ui/const-generics/nested-type.min.stderr b/src/test/ui/const-generics/nested-type.min.stderr
index dabb3f245f5b..6defd393ba06 100644
--- a/src/test/ui/const-generics/nested-type.min.stderr
+++ b/src/test/ui/const-generics/nested-type.min.stderr
@@ -12,7 +12,7 @@ LL | | }]>;
    | |__^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error[E0015]: calls in constants are limited to constant functions, tuple structs and tuple variants
   --> $DIR/nested-type.rs:15:5
diff --git a/src/test/ui/const-generics/slice-const-param-mismatch.min.stderr b/src/test/ui/const-generics/slice-const-param-mismatch.min.stderr
index 13d0b217ed29..166a35ee4556 100644
--- a/src/test/ui/const-generics/slice-const-param-mismatch.min.stderr
+++ b/src/test/ui/const-generics/slice-const-param-mismatch.min.stderr
@@ -5,7 +5,7 @@ LL | struct ConstString<const T: &'static str>;
    |                             ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static [u8]` is forbidden as the type of a const generic parameter
   --> $DIR/slice-const-param-mismatch.rs:9:28
@@ -14,7 +14,7 @@ LL | struct ConstBytes<const T: &'static [u8]>;
    |                            ^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/slice-const-param.min.stderr b/src/test/ui/const-generics/slice-const-param.min.stderr
index 821c6e3995aa..ed39a0c56b48 100644
--- a/src/test/ui/const-generics/slice-const-param.min.stderr
+++ b/src/test/ui/const-generics/slice-const-param.min.stderr
@@ -5,7 +5,7 @@ LL | pub fn function_with_str<const STRING: &'static str>() -> &'static str {
    |                                        ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static [u8]` is forbidden as the type of a const generic parameter
   --> $DIR/slice-const-param.rs:12:41
@@ -14,7 +14,7 @@ LL | pub fn function_with_bytes<const BYTES: &'static [u8]>() -> &'static [u8] {
    |                                         ^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors
 
diff --git a/src/test/ui/const-generics/std/const-generics-range.min.stderr b/src/test/ui/const-generics/std/const-generics-range.min.stderr
index d7d2a8447e90..86e6159fdb57 100644
--- a/src/test/ui/const-generics/std/const-generics-range.min.stderr
+++ b/src/test/ui/const-generics/std/const-generics-range.min.stderr
@@ -5,7 +5,7 @@ LL | struct _Range<const R: std::ops::Range<usize>>;
    |                        ^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `RangeFrom<usize>` is forbidden as the type of a const generic parameter
   --> $DIR/const-generics-range.rs:12:28
@@ -14,7 +14,7 @@ LL | struct _RangeFrom<const R: std::ops::RangeFrom<usize>>;
    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `RangeFull` is forbidden as the type of a const generic parameter
   --> $DIR/const-generics-range.rs:17:28
@@ -23,7 +23,7 @@ LL | struct _RangeFull<const R: std::ops::RangeFull>;
    |                            ^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `RangeInclusive<usize>` is forbidden as the type of a const generic parameter
   --> $DIR/const-generics-range.rs:23:33
@@ -32,7 +32,7 @@ LL | struct _RangeInclusive<const R: std::ops::RangeInclusive<usize>>;
    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `RangeTo<usize>` is forbidden as the type of a const generic parameter
   --> $DIR/const-generics-range.rs:28:26
@@ -41,7 +41,7 @@ LL | struct _RangeTo<const R: std::ops::RangeTo<usize>>;
    |                          ^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `RangeToInclusive<usize>` is forbidden as the type of a const generic parameter
   --> $DIR/const-generics-range.rs:33:35
@@ -50,7 +50,7 @@ LL | struct _RangeToInclusive<const R: std::ops::RangeToInclusive<usize>>;
    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 6 previous errors
 
diff --git a/src/test/ui/const-generics/type-dependent/issue-71348.min.stderr b/src/test/ui/const-generics/type-dependent/issue-71348.min.stderr
index 92f5d815a0fe..f3516d1de96b 100644
--- a/src/test/ui/const-generics/type-dependent/issue-71348.min.stderr
+++ b/src/test/ui/const-generics/type-dependent/issue-71348.min.stderr
@@ -5,7 +5,7 @@ LL | trait Get<'a, const N: &'static str> {
    |                        ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: `&'static str` is forbidden as the type of a const generic parameter
   --> $DIR/issue-71348.rs:18:25
@@ -14,7 +14,7 @@ LL |     fn ask<'a, const N: &'static str>(&'a self) -> &'a <Self as Get<N>>::Ta
    |                         ^^^^^^^^^^^^
    |
    = note: the only supported types are integers, `bool` and `char`
-   = help: more complex types are supported with `#[feature(const_generics)]`
+   = help: more complex types are supported with `#![feature(const_generics)]`
 
 error: aborting due to 2 previous errors