Taint more aggressively in astconv

compiler/rustc_hir_analysis/src/astconv/bounds.rs

@@ -300,13 +300,15 @@ impl<'tcx> dyn AstConv<'tcx> + '_ {
             .expect("missing associated item");
 
         if !assoc_item.visibility(tcx).is_accessible_from(def_scope, tcx) {
-            tcx.dcx()
+            let reported = tcx
+                .dcx()
                 .struct_span_err(
                     binding.span,
                     format!("{} `{}` is private", assoc_item.kind, binding.item_name),
                 )
                 .with_span_label(binding.span, format!("private {}", assoc_item.kind))
                 .emit();
+            self.set_tainted_by_errors(reported);
         }
         tcx.check_stability(assoc_item.def_id, Some(hir_ref_id), binding.span, None);
 

compiler/rustc_hir_analysis/src/astconv/errors.rs

@@ -354,7 +354,9 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         );
         err.span_label(name.span, format!("multiple `{name}` found"));
         self.note_ambiguous_inherent_assoc_type(&mut err, candidates, span);
-        err.emit()
+        let reported = err.emit();
+        self.set_tainted_by_errors(reported);
+        reported
     }
 
     // FIXME(fmease): Heavily adapted from `rustc_hir_typeck::method::suggest`. Deduplicate.
@@ -843,7 +845,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             }
         }
 
-        err.emit();
+        self.set_tainted_by_errors(err.emit());
     }
 }
 

compiler/rustc_hir_analysis/src/astconv/mod.rs

@@ -973,7 +973,9 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 }
             }
         }
-        err.emit()
+        let reported = err.emit();
+        self.set_tainted_by_errors(reported);
+        reported
     }
 
     // Search for a bound on a type parameter which includes the associated item
@@ -1050,6 +1052,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 span,
                 binding,
             );
+            self.set_tainted_by_errors(reported);
             return Err(reported);
         };
         debug!(?bound);
@@ -1127,6 +1130,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 ));
             }
             let reported = err.emit();
+            self.set_tainted_by_errors(reported);
             if !where_bounds.is_empty() {
                 return Err(reported);
             }
@@ -1381,6 +1385,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                         assoc_ident.name,
                     )
                 };
+                self.set_tainted_by_errors(reported);
                 return Err(reported);
             }
         };
@@ -1623,12 +1628,14 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
             let kind = tcx.def_kind_descr(kind, item);
             let msg = format!("{kind} `{name}` is private");
             let def_span = tcx.def_span(item);
-            tcx.dcx()
+            let reported = tcx
+                .dcx()
                 .struct_span_err(span, msg)
                 .with_code(rustc_errors::error_code!(E0624))
                 .with_span_label(span, format!("private {kind}"))
                 .with_span_label(def_span, format!("{kind} defined here"))
                 .emit();
+            self.set_tainted_by_errors(reported);
         }
         tcx.check_stability(item, Some(block), span, None);
     }
@@ -1869,7 +1876,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 err.span_label(span, format!("not allowed on {what}"));
             }
             extend(&mut err);
-            err.emit();
+            self.set_tainted_by_errors(err.emit());
             emitted = true;
         }
 
@@ -2191,7 +2198,9 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                     {
                         err.span_note(impl_.self_ty.span, "not a concrete type");
                     }
-                    Ty::new_error(tcx, err.emit())
+                    let reported = err.emit();
+                    self.set_tainted_by_errors(reported);
+                    Ty::new_error(tcx, reported)
                 } else {
                     ty
                 }
@@ -2593,7 +2602,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 );
             }
 
-            diag.emit();
+            self.set_tainted_by_errors(diag.emit());
         }
 
         // Find any late-bound regions declared in return type that do
@@ -2693,7 +2702,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 err.note("consider introducing a named lifetime parameter");
             }
 
-            err.emit();
+            self.set_tainted_by_errors(err.emit());
         }
     }
 
@@ -2732,7 +2741,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
         // error.
         let r = derived_region_bounds[0];
         if derived_region_bounds[1..].iter().any(|r1| r != *r1) {
-            tcx.dcx().emit_err(AmbiguousLifetimeBound { span });
+            self.set_tainted_by_errors(tcx.dcx().emit_err(AmbiguousLifetimeBound { span }));
         }
         Some(r)
     }

compiler/rustc_hir_analysis/src/astconv/object_safety.rs

@@ -116,7 +116,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
              for more information on them, visit \
              <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>",
             );
-            err.emit();
+            self.set_tainted_by_errors(err.emit());
         }
 
         if regular_traits.is_empty() && auto_traits.is_empty() {
@@ -127,6 +127,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                 .map(|trait_ref| tcx.def_span(trait_ref));
             let reported =
                 tcx.dcx().emit_err(TraitObjectDeclaredWithNoTraits { span, trait_alias_span });
+            self.set_tainted_by_errors(reported);
             return Ty::new_error(tcx, reported);
         }
 
@@ -290,7 +291,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
 
                 if references_self {
                     let def_id = i.bottom().0.def_id();
-                    struct_span_code_err!(
+                    let reported = struct_span_code_err!(
                         tcx.dcx(),
                         i.bottom().1,
                         E0038,
@@ -303,6 +304,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                             .error_msg(),
                     )
                     .emit();
+                    self.set_tainted_by_errors(reported);
                 }
 
                 ty::ExistentialTraitRef { def_id: trait_ref.def_id, args }
@@ -389,6 +391,7 @@ impl<'o, 'tcx> dyn AstConv<'tcx> + 'o {
                         } else {
                             err.emit()
                         };
+                        self.set_tainted_by_errors(e);
                         ty::Region::new_error(tcx, e)
                     })
                 }

tests/rustdoc-ui/unable-fulfill-trait.rs

@@ -4,7 +4,6 @@ pub struct Foo<'a, 'b, T> {
     field1: dyn Bar<'a, 'b,>,
     //~^ ERROR
     //~| ERROR
-    //~| ERROR
 }
 
 pub trait Bar<'x, 's, U>

tests/rustdoc-ui/unable-fulfill-trait.stderr

@@ -5,7 +5,7 @@ LL |     field1: dyn Bar<'a, 'b,>,
    |                 ^^^ expected 1 generic argument
    |
 note: trait defined here, with 1 generic parameter: `U`
-  --> $DIR/unable-fulfill-trait.rs:10:11
+  --> $DIR/unable-fulfill-trait.rs:9:11
    |
 LL | pub trait Bar<'x, 's, U>
    |           ^^^         -
@@ -20,24 +20,7 @@ error[E0227]: ambiguous lifetime bound, explicit lifetime bound required
 LL |     field1: dyn Bar<'a, 'b,>,
    |             ^^^^^^^^^^^^^^^^
 
-error[E0478]: lifetime bound not satisfied
-  --> $DIR/unable-fulfill-trait.rs:4:13
-   |
-LL |     field1: dyn Bar<'a, 'b,>,
-   |             ^^^^^^^^^^^^^^^^
-   |
-note: lifetime parameter instantiated with the lifetime `'b` as defined here
-  --> $DIR/unable-fulfill-trait.rs:3:20
-   |
-LL | pub struct Foo<'a, 'b, T> {
-   |                    ^^
-note: but lifetime parameter must outlive the lifetime `'a` as defined here
-  --> $DIR/unable-fulfill-trait.rs:3:16
-   |
-LL | pub struct Foo<'a, 'b, T> {
-   |                ^^
-
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 
-Some errors have detailed explanations: E0107, E0227, E0478.
+Some errors have detailed explanations: E0107, E0227.
 For more information about an error, try `rustc --explain E0107`.

tests/ui/associated-types/issue-23595-1.rs

@@ -5,9 +5,8 @@ use std::ops::Index;
 trait Hierarchy {
     type Value;
     type ChildKey;
-    type Children = dyn Index<Self::ChildKey, Output=dyn Hierarchy>;
+    type Children = dyn Index<Self::ChildKey, Output = dyn Hierarchy>;
     //~^ ERROR: the value of the associated types
-    //~| ERROR: the size for values of type
 
     fn data(&self) -> Option<(Self::Value, Self::Children)>;
 }

tests/ui/associated-types/issue-23595-1.stderr

@@ -1,27 +1,13 @@
 error[E0191]: the value of the associated types `Value`, `ChildKey` and `Children` in `Hierarchy` must be specified
-  --> $DIR/issue-23595-1.rs:8:58
+  --> $DIR/issue-23595-1.rs:8:60
    |
 LL |     type Value;
    |     ---------- `Value` defined here
 LL |     type ChildKey;
    |     ------------- `ChildKey` defined here
-LL |     type Children = dyn Index<Self::ChildKey, Output=dyn Hierarchy>;
-   |     ------------- `Children` defined here                ^^^^^^^^^ help: specify the associated types: `Hierarchy<Value = Type, ChildKey = Type, Children = Type>`
+LL |     type Children = dyn Index<Self::ChildKey, Output = dyn Hierarchy>;
+   |     ------------- `Children` defined here                  ^^^^^^^^^ help: specify the associated types: `Hierarchy<Value = Type, ChildKey = Type, Children = Type>`
 
-error[E0277]: the size for values of type `(dyn Index<<Self as Hierarchy>::ChildKey, Output = (dyn Hierarchy + 'static)> + 'static)` cannot be known at compilation time
-  --> $DIR/issue-23595-1.rs:8:21
-   |
-LL |     type Children = dyn Index<Self::ChildKey, Output=dyn Hierarchy>;
-   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
-   |
-   = help: the trait `Sized` is not implemented for `(dyn Index<<Self as Hierarchy>::ChildKey, Output = (dyn Hierarchy + 'static)> + 'static)`
-note: required by a bound in `Hierarchy::Children`
-  --> $DIR/issue-23595-1.rs:8:5
-   |
-LL |     type Children = dyn Index<Self::ChildKey, Output=dyn Hierarchy>;
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `Hierarchy::Children`
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 
-Some errors have detailed explanations: E0191, E0277.
-For more information about an error, try `rustc --explain E0191`.
+For more information about this error, try `rustc --explain E0191`.

tests/ui/derives/issue-97343.rs

@@ -2,7 +2,6 @@ use std::fmt::Debug;
 
 #[derive(Debug)]
 pub struct Irrelevant<Irrelevant> { //~ ERROR type arguments are not allowed on type parameter
-    //~^ ERROR `Irrelevant` must be used
     irrelevant: Irrelevant,
 }
 

tests/ui/derives/issue-97343.stderr

@@ -16,16 +16,6 @@ LL | pub struct Irrelevant<Irrelevant> {
    |                       ^^^^^^^^^^
    = note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
 
-error[E0210]: type parameter `Irrelevant` must be used as the type parameter for some local type (e.g., `MyStruct<Irrelevant>`)
-  --> $DIR/issue-97343.rs:4:23
-   |
-LL | pub struct Irrelevant<Irrelevant> {
-   |                       ^^^^^^^^^^ type parameter `Irrelevant` must be used as the type parameter for some local type
-   |
-   = note: implementing a foreign trait is only possible if at least one of the types for which it is implemented is local
-   = note: only traits defined in the current crate can be implemented for a type parameter
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 
-Some errors have detailed explanations: E0109, E0210.
-For more information about an error, try `rustc --explain E0109`.
+For more information about this error, try `rustc --explain E0109`.

tests/ui/error-codes/E0227.rs

@@ -6,8 +6,6 @@ trait FooBar<'foo, 'bar>: Foo<'foo> + Bar<'bar> {}
 struct Baz<'foo, 'bar> {
     baz: dyn FooBar<'foo, 'bar>,
     //~^ ERROR ambiguous lifetime bound, explicit lifetime bound required
-    //~| ERROR lifetime bound not satisfied
 }
 
-fn main() {
-}
+fn main() {}

tests/ui/error-codes/E0227.stderr

@@ -4,24 +4,6 @@ error[E0227]: ambiguous lifetime bound, explicit lifetime bound required
 LL |     baz: dyn FooBar<'foo, 'bar>,
    |          ^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0478]: lifetime bound not satisfied
-  --> $DIR/E0227.rs:7:10
-   |
-LL |     baz: dyn FooBar<'foo, 'bar>,
-   |          ^^^^^^^^^^^^^^^^^^^^^^
-   |
-note: lifetime parameter instantiated with the lifetime `'bar` as defined here
-  --> $DIR/E0227.rs:6:18
-   |
-LL | struct Baz<'foo, 'bar> {
-   |                  ^^^^
-note: but lifetime parameter must outlive the lifetime `'foo` as defined here
-  --> $DIR/E0227.rs:6:12
-   |
-LL | struct Baz<'foo, 'bar> {
-   |            ^^^^
-
-error: aborting due to 2 previous errors
+error: aborting due to 1 previous error
 
-Some errors have detailed explanations: E0227, E0478.
-For more information about an error, try `rustc --explain E0227`.
+For more information about this error, try `rustc --explain E0227`.

tests/ui/lifetimes/unusual-rib-combinations.rs

@@ -28,6 +28,5 @@ fn d<const C: S>() {}
 trait Foo<'a> {}
 struct Bar<const N: &'a (dyn for<'a> Foo<'a>)>;
 //~^ ERROR the type of const parameters must not depend on other generic parameters
-//~| ERROR `&dyn for<'a> Foo<'a>` is forbidden as the type of a const generic parameter
 
 fn main() {}

tests/ui/lifetimes/unusual-rib-combinations.stderr

@@ -58,16 +58,7 @@ LL | fn d<const C: S>() {}
    = note: the only supported types are integers, `bool` and `char`
    = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
 
-error: `&dyn for<'a> Foo<'a>` is forbidden as the type of a const generic parameter
-  --> $DIR/unusual-rib-combinations.rs:29:21
-   |
-LL | struct Bar<const N: &'a (dyn for<'a> Foo<'a>)>;
-   |                     ^^^^^^^^^^^^^^^^^^^^^^^^^
-   |
-   = note: the only supported types are integers, `bool` and `char`
-   = help: add `#![feature(adt_const_params)]` to the crate attributes to enable more complex and user defined types
-
-error: aborting due to 9 previous errors
+error: aborting due to 8 previous errors
 
 Some errors have detailed explanations: E0106, E0214, E0308, E0770.
 For more information about an error, try `rustc --explain E0106`.