Add regression test for break inside const items

Author: oli-obk

tests/ui/inline-const/break-inside-inline-const-issue-128604.rs

@@ -23,3 +23,9 @@ fn main() {
         }
     }
 }
+
+const FOO: () = break;
+//~^ ERROR: `break` outside of a loop or labeled block
+
+static BAR: () = break;
+//~^ ERROR: `break` outside of a loop or labeled block

tests/ui/inline-const/break-inside-inline-const-issue-128604.stderr

@@ -10,6 +10,18 @@ error[E0268]: `break` outside of a loop or labeled block
 LL |             break;
    |             ^^^^^ cannot `break` outside of a loop or labeled block
 
+error[E0268]: `break` outside of a loop or labeled block
+  --> $DIR/break-inside-inline-const-issue-128604.rs:27:17
+   |
+LL | const FOO: () = break;
+   |                 ^^^^^ cannot `break` outside of a loop or labeled block
+
+error[E0268]: `break` outside of a loop or labeled block
+  --> $DIR/break-inside-inline-const-issue-128604.rs:30:18
+   |
+LL | static BAR: () = break;
+   |                  ^^^^^ cannot `break` outside of a loop or labeled block
+
 error[E0268]: `break` outside of a loop or labeled block
   --> $DIR/break-inside-inline-const-issue-128604.rs:2:21
    |
@@ -34,6 +46,6 @@ LL |
 LL ~             break 'block;
    |
 
-error: aborting due to 4 previous errors
+error: aborting due to 6 previous errors
 
 For more information about this error, try `rustc --explain E0268`.