Accidentally fixed #78071

Author: Nadrieril

src/test/ui/pattern/usefulness/consts-opaque.rs

@@ -44,11 +44,13 @@ fn main() {
         //~^ ERROR unreachable pattern
     }
 
-    // FIXME: this causes an ICE (https://github.com/rust-lang/rust/issues/78071)
-    //match FOO_REF_REF {
-    //    FOO_REF_REF => {}
-    //    Foo(_) => {}
-    //}
+    // This used to cause an ICE (https://github.com/rust-lang/rust/issues/78071)
+    match FOO_REF_REF {
+        FOO_REF_REF => {}
+        //~^ WARNING must be annotated with `#[derive(PartialEq, Eq)]`
+        //~| WARNING this was previously accepted by the compiler but is being phased out
+        Foo(_) => {}
+    }
 
     match BAR {
         Bar => {}

src/test/ui/pattern/usefulness/consts-opaque.stderr

@@ -28,22 +28,32 @@ error: unreachable pattern
 LL |         Foo(_) => {} // should not be emitting unreachable warning
    |         ^^^^^^
 
+warning: to use a constant of type `Foo` in a pattern, `Foo` must be annotated with `#[derive(PartialEq, Eq)]`
+  --> $DIR/consts-opaque.rs:49:9
+   |
+LL |         FOO_REF_REF => {}
+   |         ^^^^^^^^^^^
+   |
+   = note: `#[warn(indirect_structural_match)]` 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 #62411 <https://github.com/rust-lang/rust/issues/62411>
+
 error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:55:9
+  --> $DIR/consts-opaque.rs:57:9
    |
 LL |         BAR => {} // should not be emitting unreachable warning
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:55:9
+  --> $DIR/consts-opaque.rs:57:9
    |
 LL |         Bar => {}
    |         --- matches any value
 LL |         BAR => {} // should not be emitting unreachable warning
    |         ^^^ unreachable pattern
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:58:9
+  --> $DIR/consts-opaque.rs:60:9
    |
 LL |         Bar => {}
    |         --- matches any value
@@ -52,19 +62,19 @@ LL |         _ => {}
    |         ^ unreachable pattern
 
 error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:63:9
+  --> $DIR/consts-opaque.rs:65:9
    |
 LL |         BAR => {}
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:65:9
+  --> $DIR/consts-opaque.rs:67:9
    |
 LL |         Bar => {} // should not be emitting unreachable warning
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:67:9
+  --> $DIR/consts-opaque.rs:69:9
    |
 LL |         Bar => {} // should not be emitting unreachable warning
    |         --- matches any value
@@ -73,76 +83,76 @@ LL |         _ => {}
    |         ^ unreachable pattern
 
 error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:72:9
+  --> $DIR/consts-opaque.rs:74:9
    |
 LL |         BAR => {}
    |         ^^^
 
 error: to use a constant of type `Bar` in a pattern, `Bar` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:74:9
+  --> $DIR/consts-opaque.rs:76:9
    |
 LL |         BAR => {} // should not be emitting unreachable warning
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:74:9
+  --> $DIR/consts-opaque.rs:76:9
    |
 LL |         BAR => {} // should not be emitting unreachable warning
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:77:9
+  --> $DIR/consts-opaque.rs:79:9
    |
 LL |         _ => {} // should not be emitting unreachable warning
    |         ^
 
 error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:82:9
+  --> $DIR/consts-opaque.rs:84:9
    |
 LL |         BAZ => {}
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:84:9
+  --> $DIR/consts-opaque.rs:86:9
    |
 LL |         Baz::Baz1 => {} // should not be emitting unreachable warning
    |         ^^^^^^^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:86:9
+  --> $DIR/consts-opaque.rs:88:9
    |
 LL |         _ => {}
    |         ^
 
 error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:92:9
+  --> $DIR/consts-opaque.rs:94:9
    |
 LL |         BAZ => {}
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:94:9
+  --> $DIR/consts-opaque.rs:96:9
    |
 LL |         _ => {}
    |         ^
 
 error: to use a constant of type `Baz` in a pattern, `Baz` must be annotated with `#[derive(PartialEq, Eq)]`
-  --> $DIR/consts-opaque.rs:99:9
+  --> $DIR/consts-opaque.rs:101:9
    |
 LL |         BAZ => {}
    |         ^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:101:9
+  --> $DIR/consts-opaque.rs:103:9
    |
 LL |         Baz::Baz2 => {} // should not be emitting unreachable warning
    |         ^^^^^^^^^
 
 error: unreachable pattern
-  --> $DIR/consts-opaque.rs:103:9
+  --> $DIR/consts-opaque.rs:105:9
    |
 LL |         _ => {} // should not be emitting unreachable warning
    |         ^
 
-error: aborting due to 22 previous errors
+error: aborting due to 22 previous errors; 1 warning emitted