Revert PR #114052 to fix invalid suggestion

compiler/rustc_hir_typeck/src/demand.rs

@@ -53,7 +53,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
             || self.suggest_no_capture_closure(err, expected, expr_ty)
             || self.suggest_boxing_when_appropriate(err, expr.span, expr.hir_id, expected, expr_ty)
             || self.suggest_block_to_brackets_peeling_refs(err, expr, expr_ty, expected)
-            || self.suggest_copied_cloned_or_as_ref(err, expr, expr_ty, expected, expected_ty_expr)
+            || self.suggest_copied_cloned_or_as_ref(err, expr, expr_ty, expected)
             || self.suggest_clone_for_ref(err, expr, expr_ty, expected)
             || self.suggest_into(err, expr, expr_ty, expected)
             || self.suggest_floating_point_literal(err, expr, expected)

compiler/rustc_hir_typeck/src/errors.rs

@@ -253,7 +253,7 @@ impl HelpUseLatestEdition {
 }
 
 #[derive(Subdiagnostic)]
-pub enum OptionResultRefMismatch<'tcx> {
+pub enum OptionResultRefMismatch {
     #[suggestion(
         hir_typeck_option_result_copied,
         code = ".copied()",
@@ -276,19 +276,20 @@ pub enum OptionResultRefMismatch<'tcx> {
         span: Span,
         def_path: String,
     },
-    #[suggestion(
+    // FIXME: #114050
-        hir_typeck_option_result_asref,
+    // #[suggestion(
-        code = ".as_ref()",
+    //     hir_typeck_option_result_asref,
-        style = "verbose",
+    //     code = ".as_ref()",
-        applicability = "machine-applicable"
+    //     style = "verbose",
-    )]
+    //     applicability = "machine-applicable"
-    AsRef {
+    // )]
-        #[primary_span]
+    // AsRef {
-        span: Span,
+    //     #[primary_span]
-        def_path: String,
+    //     span: Span,
-        expected_ty: Ty<'tcx>,
+    //     def_path: String,
-        expr_ty: Ty<'tcx>,
+    //     expected_ty: Ty<'tcx>,
-    },
+    //     expr_ty: Ty<'tcx>,
+    // },
 }
 
 #[derive(Diagnostic)]

compiler/rustc_hir_typeck/src/fn_ctxt/suggestions.rs

@@ -1097,7 +1097,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         expr: &hir::Expr<'_>,
         expr_ty: Ty<'tcx>,
         expected_ty: Ty<'tcx>,
-        expected_ty_expr: Option<&'tcx hir::Expr<'tcx>>,
     ) -> bool {
         let ty::Adt(adt_def, args) = expr_ty.kind() else {
             return false;
@@ -1115,7 +1114,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         {
             let expr_inner_ty = args.type_at(0);
             let expected_inner_ty = expected_args.type_at(0);
-            if let &ty::Ref(_, ty, mutability) = expr_inner_ty.kind()
+            if let &ty::Ref(_, ty, _mutability) = expr_inner_ty.kind()
                     && self.can_eq(self.param_env, ty, expected_inner_ty)
                 {
                     let def_path = self.tcx.def_path_str(adt_def.did());
@@ -1124,14 +1123,6 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                         errors::OptionResultRefMismatch::Copied {
                             span, def_path
                         }
-                    } else if let Some(expected_ty_expr) = expected_ty_expr
-                            // FIXME: suggest changes to both expressions to convert both to
-                            // Option/Result<&T>
-                            && mutability.is_not()
-                        {
-                        errors::OptionResultRefMismatch::AsRef {
-                            span: expected_ty_expr.span.shrink_to_hi(), expected_ty, expr_ty, def_path
-                        }
                     } else if let Some(clone_did) = self.tcx.lang_items().clone_trait()
                         && rustc_trait_selection::traits::type_known_to_meet_bound_modulo_regions(
                             self,

tests/ui/associated-types/dont-suggest-cyclic-constraint.fixed

@@ -1,13 +0,0 @@
-// run-rustfix
-
-use std::fmt::Debug;
-
-pub fn foo<I: Iterator>(mut iter: I, value: &I::Item)
-where
-    I::Item: Eq + Debug,
-{
-    debug_assert_eq!(iter.next().as_ref(), Some(value));
-    //~^ ERROR mismatched types
-}
-
-fn main() {}

tests/ui/associated-types/dont-suggest-cyclic-constraint.rs

@@ -1,5 +1,3 @@
-// run-rustfix
-
 use std::fmt::Debug;
 
 pub fn foo<I: Iterator>(mut iter: I, value: &I::Item)

tests/ui/associated-types/dont-suggest-cyclic-constraint.stderr

@@ -1,15 +1,11 @@
 error[E0308]: mismatched types
-  --> $DIR/dont-suggest-cyclic-constraint.rs:9:35
+  --> $DIR/dont-suggest-cyclic-constraint.rs:7:35
    |
 LL |     debug_assert_eq!(iter.next(), Some(value));
    |                                   ^^^^^^^^^^^ expected `Option<<I as Iterator>::Item>`, found `Option<&<I as Iterator>::Item>`
    |
    = note: expected enum `Option<<I as Iterator>::Item>`
               found enum `Option<&<I as Iterator>::Item>`
-help: use `Option::as_ref` to convert `Option<<I as Iterator>::Item>` to `Option<&<I as Iterator>::Item>`
-   |
-LL |     debug_assert_eq!(iter.next().as_ref(), Some(value));
-   |                                 +++++++++
 
 error: aborting due to previous error
 

tests/ui/suggestions/copied-and-cloned.fixed

@@ -2,6 +2,16 @@
 
 fn expect<T>(_: T) {}
 
+struct Issue114925 {
+    x: Option<String>,
+}
+
+fn issue_114925(lol: &mut Issue114925, x: Option<&String>) {
+    lol.x = x.clone().cloned();
+    //~^ ERROR mismatched types
+    //~| HELP use `Option::cloned` to clone the value inside the `Option`
+}
+
 fn main() {
     let x = Some(&());
     expect::<Option<()>>(x.copied());
@@ -24,10 +34,10 @@ fn main() {
     let s = String::new();
     let x = Some(s.clone());
     let y = Some(&s);
-    println!("{}", x.as_ref() == y);
+    println!("{}", x == y.cloned());
     //~^ ERROR mismatched types
-    //~| HELP use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
+    //~| HELP use `Option::cloned` to clone the value inside the `Option`
-
+    //FIXME(#114050) ~| HELP use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
 
     let mut s = ();
     let x = Some(s);
@@ -42,4 +52,6 @@ fn main() {
     println!("{}", x == y.cloned());
     //~^ ERROR mismatched types
     //~| HELP use `Option::cloned` to clone the value inside the `Option`
+
+    issue_114925(&mut Issue114925 { x: None }, None);
 }

tests/ui/suggestions/copied-and-cloned.rs

@@ -2,6 +2,16 @@
 
 fn expect<T>(_: T) {}
 
+struct Issue114925 {
+    x: Option<String>,
+}
+
+fn issue_114925(lol: &mut Issue114925, x: Option<&String>) {
+    lol.x = x.clone();
+    //~^ ERROR mismatched types
+    //~| HELP use `Option::cloned` to clone the value inside the `Option`
+}
+
 fn main() {
     let x = Some(&());
     expect::<Option<()>>(x);
@@ -26,8 +36,8 @@ fn main() {
     let y = Some(&s);
     println!("{}", x == y);
     //~^ ERROR mismatched types
-    //~| HELP use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
+    //~| HELP use `Option::cloned` to clone the value inside the `Option`
-
+    //FIXME(#114050) ~| HELP use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
 
     let mut s = ();
     let x = Some(s);
@@ -42,4 +52,6 @@ fn main() {
     println!("{}", x == y);
     //~^ ERROR mismatched types
     //~| HELP use `Option::cloned` to clone the value inside the `Option`
+
+    issue_114925(&mut Issue114925 { x: None }, None);
 }

tests/ui/suggestions/copied-and-cloned.stderr

@@ -1,5 +1,20 @@
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:7:26
+  --> $DIR/copied-and-cloned.rs:10:13
+   |
+LL |     lol.x = x.clone();
+   |     -----   ^^^^^^^^^ expected `Option<String>`, found `Option<&String>`
+   |     |
+   |     expected due to the type of this binding
+   |
+   = note: expected enum `Option<String>`
+              found enum `Option<&String>`
+help: use `Option::cloned` to clone the value inside the `Option`
+   |
+LL |     lol.x = x.clone().cloned();
+   |                      +++++++++
+
+error[E0308]: mismatched types
+  --> $DIR/copied-and-cloned.rs:17:26
    |
 LL |     expect::<Option<()>>(x);
    |     -------------------- ^ expected `Option<()>`, found `Option<&()>`
@@ -19,7 +34,7 @@ LL |     expect::<Option<()>>(x.copied());
    |                           +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:11:30
+  --> $DIR/copied-and-cloned.rs:21:30
    |
 LL |     expect::<Result<(), ()>>(x);
    |     ------------------------ ^ expected `Result<(), ()>`, found `Result<&(), _>`
@@ -39,7 +54,7 @@ LL |     expect::<Result<(), ()>>(x.copied());
    |                               +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:16:30
+  --> $DIR/copied-and-cloned.rs:26:30
    |
 LL |     expect::<Option<String>>(x);
    |     ------------------------ ^ expected `Option<String>`, found `Option<&String>`
@@ -59,7 +74,7 @@ LL |     expect::<Option<String>>(x.cloned());
    |                               +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:20:34
+  --> $DIR/copied-and-cloned.rs:30:34
    |
 LL |     expect::<Result<String, ()>>(x);
    |     ---------------------------- ^ expected `Result<String, ()>`, found `Result<&String, _>`
@@ -79,20 +94,20 @@ LL |     expect::<Result<String, ()>>(x.cloned());
    |                                   +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:27:25
+  --> $DIR/copied-and-cloned.rs:37:25
    |
 LL |     println!("{}", x == y);
    |                         ^ expected `Option<String>`, found `Option<&String>`
    |
    = note: expected enum `Option<String>`
               found enum `Option<&String>`
-help: use `Option::as_ref` to convert `Option<String>` to `Option<&String>`
+help: use `Option::cloned` to clone the value inside the `Option`
    |
-LL |     println!("{}", x.as_ref() == y);
+LL |     println!("{}", x == y.cloned());
-   |                     +++++++++
+   |                          +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:35:25
+  --> $DIR/copied-and-cloned.rs:45:25
    |
 LL |     println!("{}", x == y);
    |                         ^ expected `Option<()>`, found `Option<&mut ()>`
@@ -105,7 +120,7 @@ LL |     println!("{}", x == y.copied());
    |                          +++++++++
 
 error[E0308]: mismatched types
-  --> $DIR/copied-and-cloned.rs:42:25
+  --> $DIR/copied-and-cloned.rs:52:25
    |
 LL |     println!("{}", x == y);
    |                         ^ expected `Option<String>`, found `Option<&mut String>`
@@ -117,6 +132,6 @@ help: use `Option::cloned` to clone the value inside the `Option`
 LL |     println!("{}", x == y.cloned());
    |                          +++++++++
 
-error: aborting due to 7 previous errors
+error: aborting due to 8 previous errors
 
 For more information about this error, try `rustc --explain E0308`.