Visit opaque types during type collection too.

23 files changed, 120 insertions, 342 deletions

diff --git a/compiler/rustc_hir_analysis/src/collect.rs b/compiler/rustc_hir_analysis/src/collect.rs
index 4bca16c3a1c..0e7a5ebf5ab 100644
--- a/compiler/rustc_hir_analysis/src/collect.rs
+++ b/compiler/rustc_hir_analysis/src/collect.rs
@@ -644,12 +644,6 @@ fn convert_item(tcx: TyCtxt<'_>, item_id: hir::ItemId) {
             }
         }
 
-        // Desugared from `impl Trait`, so visited by the function's return type.
-        hir::ItemKind::OpaqueTy(hir::OpaqueTy {
-            origin: hir::OpaqueTyOrigin::FnReturn(..) | hir::OpaqueTyOrigin::AsyncFn(..),
-            ..
-        }) => {}
-
         // Don't call `type_of` on opaque types, since that depends on type
         // checking function bodies. `check_item_type` ensures that it's called
         // instead.
@@ -657,27 +651,32 @@ fn convert_item(tcx: TyCtxt<'_>, item_id: hir::ItemId) {
             tcx.ensure().generics_of(def_id);
             tcx.ensure().predicates_of(def_id);
             tcx.ensure().explicit_item_bounds(def_id);
+            tcx.ensure().item_bounds(def_id);
         }
-        hir::ItemKind::TyAlias(..)
-        | hir::ItemKind::Static(..)
-        | hir::ItemKind::Const(..)
-        | hir::ItemKind::Fn(..) => {
+
+        hir::ItemKind::TyAlias(..) => {
             tcx.ensure().generics_of(def_id);
             tcx.ensure().type_of(def_id);
             tcx.ensure().predicates_of(def_id);
-            match it.kind {
-                hir::ItemKind::Fn(..) => tcx.ensure().fn_sig(def_id),
-                hir::ItemKind::OpaqueTy(..) => tcx.ensure().item_bounds(def_id),
-                hir::ItemKind::Const(ty, ..) | hir::ItemKind::Static(ty, ..) => {
-                    if !is_suggestable_infer_ty(ty) {
-                        let mut visitor = HirPlaceholderCollector::default();
-                        visitor.visit_item(it);
-                        placeholder_type_error(tcx, None, visitor.0, false, None, it.kind.descr());
-                    }
-                }
-                _ => (),
+        }
+
+        hir::ItemKind::Static(ty, ..) | hir::ItemKind::Const(ty, ..) => {
+            tcx.ensure().generics_of(def_id);
+            tcx.ensure().type_of(def_id);
+            tcx.ensure().predicates_of(def_id);
+            if !is_suggestable_infer_ty(ty) {
+                let mut visitor = HirPlaceholderCollector::default();
+                visitor.visit_item(it);
+                placeholder_type_error(tcx, None, visitor.0, false, None, it.kind.descr());
             }
         }
+
+        hir::ItemKind::Fn(..) => {
+            tcx.ensure().generics_of(def_id);
+            tcx.ensure().type_of(def_id);
+            tcx.ensure().predicates_of(def_id);
+            tcx.ensure().fn_sig(def_id);
+        }
     }
 }
 
diff --git a/src/test/ui/associated-type-bounds/duplicate.rs b/src/test/ui/associated-type-bounds/duplicate.rs
index 6e464f69510..f67410986e5 100644
--- a/src/test/ui/associated-type-bounds/duplicate.rs
+++ b/src/test/ui/associated-type-bounds/duplicate.rs
@@ -132,12 +132,15 @@ where
 }
 
 fn FRPIT1() -> impl Iterator<Item: Copy, Item: Send> {
+    //~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
     iter::empty()
 }
 fn FRPIT2() -> impl Iterator<Item: Copy, Item: Copy> {
+    //~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
     iter::empty()
 }
 fn FRPIT3() -> impl Iterator<Item: 'static, Item: 'static> {
+    //~^ ERROR the value of the associated type `Item` (from trait `Iterator`) is already specified [E0719]
     iter::empty()
 }
 fn FAPIT1(_: impl Iterator<Item: Copy, Item: Send>) {}
diff --git a/src/test/ui/associated-type-bounds/duplicate.stderr b/src/test/ui/associated-type-bounds/duplicate.stderr
index e4f4836f71a..c3061327f56 100644
--- a/src/test/ui/associated-type-bounds/duplicate.stderr
+++ b/src/test/ui/associated-type-bounds/duplicate.stderr
@@ -191,7 +191,31 @@ LL |     T: Iterator<Item: 'static, Item: 'static>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:143:40
+  --> $DIR/duplicate.rs:134:42
+   |
+LL | fn FRPIT1() -> impl Iterator<Item: Copy, Item: Send> {
+   |                              ----------  ^^^^^^^^^^ re-bound here
+   |                              |
+   |                              `Item` bound here first
+
+error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
+  --> $DIR/duplicate.rs:138:42
+   |
+LL | fn FRPIT2() -> impl Iterator<Item: Copy, Item: Copy> {
+   |                              ----------  ^^^^^^^^^^ re-bound here
+   |                              |
+   |                              `Item` bound here first
+
+error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
+  --> $DIR/duplicate.rs:142:45
+   |
+LL | fn FRPIT3() -> impl Iterator<Item: 'static, Item: 'static> {
+   |                              -------------  ^^^^^^^^^^^^^ re-bound here
+   |                              |
+   |                              `Item` bound here first
+
+error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
+  --> $DIR/duplicate.rs:146:40
    |
 LL | fn FAPIT1(_: impl Iterator<Item: Copy, Item: Send>) {}
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -199,7 +223,7 @@ LL | fn FAPIT1(_: impl Iterator<Item: Copy, Item: Send>) {}
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:145:40
+  --> $DIR/duplicate.rs:148:40
    |
 LL | fn FAPIT2(_: impl Iterator<Item: Copy, Item: Copy>) {}
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -207,7 +231,7 @@ LL | fn FAPIT2(_: impl Iterator<Item: Copy, Item: Copy>) {}
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:147:43
+  --> $DIR/duplicate.rs:150:43
    |
 LL | fn FAPIT3(_: impl Iterator<Item: 'static, Item: 'static>) {}
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -215,7 +239,7 @@ LL | fn FAPIT3(_: impl Iterator<Item: 'static, Item: 'static>) {}
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:150:35
+  --> $DIR/duplicate.rs:153:35
    |
 LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -223,7 +247,7 @@ LL | type TAI1<T: Iterator<Item: Copy, Item: Send>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:152:35
+  --> $DIR/duplicate.rs:155:35
    |
 LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       ----------  ^^^^^^^^^^ re-bound here
@@ -231,7 +255,7 @@ LL | type TAI2<T: Iterator<Item: Copy, Item: Copy>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:154:38
+  --> $DIR/duplicate.rs:157:38
    |
 LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       -------------  ^^^^^^^^^^^^^ re-bound here
@@ -239,7 +263,7 @@ LL | type TAI3<T: Iterator<Item: 'static, Item: 'static>> = T;
    |                       `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:158:29
+  --> $DIR/duplicate.rs:161:29
    |
 LL |     T: Iterator<Item: Copy, Item: Send>,
    |                 ----------  ^^^^^^^^^^ re-bound here
@@ -247,7 +271,7 @@ LL |     T: Iterator<Item: Copy, Item: Send>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:163:29
+  --> $DIR/duplicate.rs:166:29
    |
 LL |     T: Iterator<Item: Copy, Item: Copy>,
    |                 ----------  ^^^^^^^^^^ re-bound here
@@ -255,7 +279,7 @@ LL |     T: Iterator<Item: Copy, Item: Copy>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:168:32
+  --> $DIR/duplicate.rs:171:32
    |
 LL |     T: Iterator<Item: 'static, Item: 'static>,
    |                 -------------  ^^^^^^^^^^^^^ re-bound here
@@ -263,7 +287,7 @@ LL |     T: Iterator<Item: 'static, Item: 'static>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:172:36
+  --> $DIR/duplicate.rs:175:36
    |
 LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -271,7 +295,7 @@ LL | type ETAI1<T: Iterator<Item: Copy, Item: Send>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:174:36
+  --> $DIR/duplicate.rs:177:36
    |
 LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -279,7 +303,7 @@ LL | type ETAI2<T: Iterator<Item: Copy, Item: Copy>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:176:39
+  --> $DIR/duplicate.rs:179:39
    |
 LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -287,7 +311,7 @@ LL | type ETAI3<T: Iterator<Item: 'static, Item: 'static>> = impl Copy;
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:178:40
+  --> $DIR/duplicate.rs:181:40
    |
 LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -295,7 +319,7 @@ LL | type ETAI4 = impl Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:180:40
+  --> $DIR/duplicate.rs:183:40
    |
 LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -303,7 +327,7 @@ LL | type ETAI5 = impl Iterator<Item: Copy, Item: Copy>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:182:43
+  --> $DIR/duplicate.rs:185:43
    |
 LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -311,7 +335,7 @@ LL | type ETAI6 = impl Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:185:36
+  --> $DIR/duplicate.rs:188:36
    |
 LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -319,7 +343,7 @@ LL | trait TRI1<T: Iterator<Item: Copy, Item: Send>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:187:36
+  --> $DIR/duplicate.rs:190:36
    |
 LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        ----------  ^^^^^^^^^^ re-bound here
@@ -327,7 +351,7 @@ LL | trait TRI2<T: Iterator<Item: Copy, Item: Copy>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:189:39
+  --> $DIR/duplicate.rs:192:39
    |
 LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        -------------  ^^^^^^^^^^^^^ re-bound here
@@ -335,7 +359,7 @@ LL | trait TRI3<T: Iterator<Item: 'static, Item: 'static>> {}
    |                        `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:191:34
+  --> $DIR/duplicate.rs:194:34
    |
 LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -343,7 +367,7 @@ LL | trait TRS1: Iterator<Item: Copy, Item: Send> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:193:34
+  --> $DIR/duplicate.rs:196:34
    |
 LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -351,7 +375,7 @@ LL | trait TRS2: Iterator<Item: Copy, Item: Copy> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:195:37
+  --> $DIR/duplicate.rs:198:37
    |
 LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      -------------  ^^^^^^^^^^^^^ re-bound here
@@ -359,7 +383,7 @@ LL | trait TRS3: Iterator<Item: 'static, Item: 'static> {}
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:199:29
+  --> $DIR/duplicate.rs:202:29
    |
 LL |     T: Iterator<Item: Copy, Item: Send>,
    |                 ----------  ^^^^^^^^^^ re-bound here
@@ -367,7 +391,7 @@ LL |     T: Iterator<Item: Copy, Item: Send>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:205:29
+  --> $DIR/duplicate.rs:208:29
    |
 LL |     T: Iterator<Item: Copy, Item: Copy>,
    |                 ----------  ^^^^^^^^^^ re-bound here
@@ -375,7 +399,7 @@ LL |     T: Iterator<Item: Copy, Item: Copy>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:211:32
+  --> $DIR/duplicate.rs:214:32
    |
 LL |     T: Iterator<Item: 'static, Item: 'static>,
    |                 -------------  ^^^^^^^^^^^^^ re-bound here
@@ -383,7 +407,7 @@ LL |     T: Iterator<Item: 'static, Item: 'static>,
    |                 `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:217:32
+  --> $DIR/duplicate.rs:220:32
    |
 LL |     Self: Iterator<Item: Copy, Item: Send>,
    |                    ----------  ^^^^^^^^^^ re-bound here
@@ -391,7 +415,7 @@ LL |     Self: Iterator<Item: Copy, Item: Send>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:217:32
+  --> $DIR/duplicate.rs:220:32
    |
 LL |     Self: Iterator<Item: Copy, Item: Send>,
    |                    ----------  ^^^^^^^^^^ re-bound here
@@ -399,7 +423,7 @@ LL |     Self: Iterator<Item: Copy, Item: Send>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:224:32
+  --> $DIR/duplicate.rs:227:32
    |
 LL |     Self: Iterator<Item: Copy, Item: Copy>,
    |                    ----------  ^^^^^^^^^^ re-bound here
@@ -407,7 +431,7 @@ LL |     Self: Iterator<Item: Copy, Item: Copy>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:224:32
+  --> $DIR/duplicate.rs:227:32
    |
 LL |     Self: Iterator<Item: Copy, Item: Copy>,
    |                    ----------  ^^^^^^^^^^ re-bound here
@@ -415,7 +439,7 @@ LL |     Self: Iterator<Item: Copy, Item: Copy>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:231:35
+  --> $DIR/duplicate.rs:234:35
    |
 LL |     Self: Iterator<Item: 'static, Item: 'static>,
    |                    -------------  ^^^^^^^^^^^^^ re-bound here
@@ -423,7 +447,7 @@ LL |     Self: Iterator<Item: 'static, Item: 'static>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:231:35
+  --> $DIR/duplicate.rs:234:35
    |
 LL |     Self: Iterator<Item: 'static, Item: 'static>,
    |                    -------------  ^^^^^^^^^^^^^ re-bound here
@@ -431,7 +455,7 @@ LL |     Self: Iterator<Item: 'static, Item: 'static>,
    |                    `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:249:40
+  --> $DIR/duplicate.rs:252:40
    |
 LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            ----------  ^^^^^^^^^^ re-bound here
@@ -439,7 +463,7 @@ LL | type TADyn1 = dyn Iterator<Item: Copy, Item: Send>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:251:44
+  --> $DIR/duplicate.rs:254:44
    |
 LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                ----------  ^^^^^^^^^^ re-bound here
@@ -447,7 +471,7 @@ LL | type TADyn2 = Box<dyn Iterator<Item: Copy, Item: Copy>>;
    |                                `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:253:43
+  --> $DIR/duplicate.rs:256:43
    |
 LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            -------------  ^^^^^^^^^^^^^ re-bound here
@@ -455,7 +479,7 @@ LL | type TADyn3 = dyn Iterator<Item: 'static, Item: 'static>;
    |                            `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:237:34
+  --> $DIR/duplicate.rs:240:34
    |
 LL |     type A: Iterator<Item: Copy, Item: Send>;
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -463,7 +487,7 @@ LL |     type A: Iterator<Item: Copy, Item: Send>;
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:241:34
+  --> $DIR/duplicate.rs:244:34
    |
 LL |     type A: Iterator<Item: Copy, Item: Copy>;
    |                      ----------  ^^^^^^^^^^ re-bound here
@@ -471,13 +495,13 @@ LL |     type A: Iterator<Item: Copy, Item: Copy>;
    |                      `Item` bound here first
 
 error[E0719]: the value of the associated type `Item` (from trait `Iterator`) is already specified
-  --> $DIR/duplicate.rs:245:37
+  --> $DIR/duplicate.rs:248:37
    |
 LL |     type A: Iterator<Item: 'static, Item: 'static>;
    |                      -------------  ^^^^^^^^^^^^^ re-bound here
    |                      |
    |                      `Item` bound here first
 
-error: aborting due to 60 previous errors
+error: aborting due to 63 previous errors
 
 For more information about this error, try `rustc --explain E0719`.
diff --git a/src/test/ui/async-await/issues/issue-65159.rs b/src/test/ui/async-await/issues/issue-65159.rs
index 1dbf5db6c32..df2ca025705 100644
--- a/src/test/ui/async-await/issues/issue-65159.rs
+++ b/src/test/ui/async-await/issues/issue-65159.rs
@@ -6,7 +6,6 @@ async fn copy() -> Result<()>
 //~^ ERROR this enum takes 2 generic arguments
 {
     Ok(())
-    //~^ ERROR type annotations needed
 }
 
 fn main() { }
diff --git a/src/test/ui/async-await/issues/issue-65159.stderr b/src/test/ui/async-await/issues/issue-65159.stderr
index 9918f569cbc..45f5ec40cd7 100644
--- a/src/test/ui/async-await/issues/issue-65159.stderr
+++ b/src/test/ui/async-await/issues/issue-65159.stderr
@@ -16,18 +16,6 @@ help: add missing generic argument
 LL | async fn copy() -> Result<(), E>
    |                             +++
 
-error[E0282]: type annotations needed
-  --> $DIR/issue-65159.rs:8:5
-   |
-LL |     Ok(())
-   |     ^^ cannot infer type of the type parameter `E` declared on the enum `Result`
-   |
-help: consider specifying the generic arguments
-   |
-LL |     Ok::<(), E>(())
-   |       +++++++++
-
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0107, E0282.
-For more information about an error, try `rustc --explain E0107`.
+For more information about this error, try `rustc --explain E0107`.
diff --git a/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.rs b/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.rs
index 2c8a700bc2e..dd0320bc53b 100644
--- a/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.rs
+++ b/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.rs
@@ -17,7 +17,6 @@ async fn buy_lock(generator: &Mutex<MarketMultiplier>) -> LockedMarket<'_> {
     //~^ ERROR this struct takes 0 lifetime arguments but 1 lifetime argument was supplied
     //~^^ ERROR this struct takes 1 generic argument but 0 generic arguments were supplied
     LockedMarket(generator.lock().unwrap().buy())
-    //~^ ERROR cannot return value referencing temporary
 }
 
 struct LockedMarket<T>(T);
diff --git a/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.stderr b/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.stderr
index 4bd06673043..d2b927fb664 100644
--- a/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.stderr
+++ b/src/test/ui/borrowck/issue-82126-mismatched-subst-and-hir.stderr
@@ -7,7 +7,7 @@ LL | async fn buy_lock(generator: &Mutex<MarketMultiplier>) -> LockedMarket<'_>
    |                                                           expected 0 lifetime arguments
    |
 note: struct defined here, with 0 lifetime parameters
-  --> $DIR/issue-82126-mismatched-subst-and-hir.rs:23:8
+  --> $DIR/issue-82126-mismatched-subst-and-hir.rs:22:8
    |
 LL | struct LockedMarket<T>(T);
    |        ^^^^^^^^^^^^
@@ -19,7 +19,7 @@ LL | async fn buy_lock(generator: &Mutex<MarketMultiplier>) -> LockedMarket<'_>
    |                                                           ^^^^^^^^^^^^ expected 1 generic argument
    |
 note: struct defined here, with 1 generic parameter: `T`
-  --> $DIR/issue-82126-mismatched-subst-and-hir.rs:23:8
+  --> $DIR/issue-82126-mismatched-subst-and-hir.rs:22:8
    |
 LL | struct LockedMarket<T>(T);
    |        ^^^^^^^^^^^^ -
@@ -28,16 +28,6 @@ help: add missing generic argument
 LL | async fn buy_lock(generator: &Mutex<MarketMultiplier>) -> LockedMarket<'_, T> {
    |                                                                          +++
 
-error[E0515]: cannot return value referencing temporary value
-  --> $DIR/issue-82126-mismatched-subst-and-hir.rs:19:5
-   |
-LL |     LockedMarket(generator.lock().unwrap().buy())
-   |     ^^^^^^^^^^^^^-------------------------^^^^^^^
-   |     |            |
-   |     |            temporary value created here
-   |     returns a value referencing data owned by the current function
-
-error: aborting due to 3 previous errors
+error: aborting due to 2 previous errors
 
-Some errors have detailed explanations: E0107, E0515.
-For more information about an error, try `rustc --explain E0107`.
+For more information about this error, try `rustc --explain E0107`.
diff --git a/src/test/ui/const-generics/min_const_generics/macro-fail.rs b/src/test/ui/const-generics/min_const_generics/macro-fail.rs
index f83518fc9d4..7fb69032e6f 100644
--- a/src/test/ui/const-generics/min_const_generics/macro-fail.rs
+++ b/src/test/ui/const-generics/min_const_generics/macro-fail.rs
@@ -14,7 +14,6 @@ impl<const N: usize> Marker<N> for Example<N> {}
 fn make_marker() -> impl Marker<gimme_a_const!(marker)> {
   //~^ ERROR: type provided when a constant was expected
   Example::<gimme_a_const!(marker)>
-  //~^ ERROR: type provided when a constant was expected
 }
 
 fn from_marker(_: impl Marker<{
@@ -34,9 +33,7 @@ fn main() {
   }>;
 
   let _fail = Example::<external_macro!()>;
-  //~^ ERROR: type provided when a constant was expected
 
   let _fail = Example::<gimme_a_const!()>;
-  //~^ ERROR: type provided when a constant was expected
-  //~| ERROR unexpected end of macro invocation
+  //~^ ERROR unexpected end of macro invocation
 }
diff --git a/src/test/ui/const-generics/min_const_generics/macro-fail.stderr b/src/test/ui/const-generics/min_const_generics/macro-fail.stderr
index d5dd70d9b48..2b75c197748 100644
--- a/src/test/ui/const-generics/min_const_generics/macro-fail.stderr
+++ b/src/test/ui/const-generics/min_const_generics/macro-fail.stderr
@@ -1,5 +1,5 @@
 error: expected type, found `{`
-  --> $DIR/macro-fail.rs:29:27
+  --> $DIR/macro-fail.rs:28:27
    |
 LL | fn make_marker() -> impl Marker<gimme_a_const!(marker)> {
    |                                 ----------------------
@@ -13,7 +13,7 @@ LL |       ($rusty: ident) => {{ let $rusty = 3; *&$rusty }}
    = note: this error originates in the macro `gimme_a_const` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: expected type, found `{`
-  --> $DIR/macro-fail.rs:29:27
+  --> $DIR/macro-fail.rs:28:27
    |
 LL |   Example::<gimme_a_const!(marker)>
    |             ----------------------
@@ -46,7 +46,7 @@ LL |     let _fail = Example::<external_macro!()>;
    = note: this error originates in the macro `external_macro` (in Nightly builds, run with -Z macro-backtrace for more info)
 
 error: unexpected end of macro invocation
-  --> $DIR/macro-fail.rs:39:25
+  --> $DIR/macro-fail.rs:37:25
    |
 LL |     macro_rules! gimme_a_const {
    |     -------------------------- when calling this macro
@@ -60,24 +60,6 @@ error[E0747]: type provided when a constant was expected
 LL | fn make_marker() -> impl Marker<gimme_a_const!(marker)> {
    |                                 ^^^^^^^^^^^^^^^^^^^^^^
 
-error[E0747]: type provided when a constant was expected
-  --> $DIR/macro-fail.rs:16:13
-   |
-LL |   Example::<gimme_a_const!(marker)>
-   |             ^^^^^^^^^^^^^^^^^^^^^^
-
-error[E0747]: type provided when a constant was expected
-  --> $DIR/macro-fail.rs:36:25
-   |
-LL |   let _fail = Example::<external_macro!()>;
-   |                         ^^^^^^^^^^^^^^^^^
-
-error[E0747]: type provided when a constant was expected
-  --> $DIR/macro-fail.rs:39:25
-   |
-LL |   let _fail = Example::<gimme_a_const!()>;
-   |                         ^^^^^^^^^^^^^^^^
-
-error: aborting due to 8 previous errors
+error: aborting due to 5 previous errors
 
 For more information about this error, try `rustc --explain E0747`.
diff --git a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr
index 88e2520bf4b..30fbba16868 100644
--- a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr
+++ b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.edition2021.stderr
@@ -9,13 +9,6 @@ help: add `dyn` keyword before this trait
 LL | fn ice() -> impl AsRef<dyn Fn(&())> {
    |                        +++
 
-error[E0277]: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied
-  --> $DIR/generic-with-implicit-hrtb-without-dyn.rs:6:13
-   |
-LL | fn ice() -> impl AsRef<Fn(&())> {
-   |             ^^^^^^^^^^^^^^^^^^^ the trait `AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not implemented for `()`
-
-error: aborting due to 2 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0277, E0782.
-For more information about an error, try `rustc --explain E0277`.
+For more information about this error, try `rustc --explain E0782`.
diff --git a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs
index 5a922697f6f..bed81c4bca7 100644
--- a/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs
+++ b/src/test/ui/impl-trait/generic-with-implicit-hrtb-without-dyn.rs
@@ -4,8 +4,8 @@
 #![allow(warnings)]
 
 fn ice() -> impl AsRef<Fn(&())> {
-    //~^ ERROR: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied [E0277]
-    //[edition2021]~| ERROR: trait objects must include the `dyn` keyword [E0782]
+    //[edition2015]~^ ERROR: the trait bound `(): AsRef<(dyn for<'a> Fn(&'a ()) + 'static)>` is not satisfied [E0277]
+    //[edition2021]~^^ ERROR: trait objects must include the `dyn` keyword [E0782]
     todo!()
 }
 
diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs
index 06c3d9ad434..527a4586fd7 100644
--- a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs
+++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.rs
@@ -4,19 +4,16 @@ use std::fmt::Debug;
 fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     |x| x
-    //~^ ERROR lifetime may not live long enough
 }
 
 fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     |x| x
-    //~^ ERROR lifetime may not live long enough
 }
 
 fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     |x| x
-    //~^ ERROR lifetime may not live long enough
 }
 
 fn d() -> impl Fn() -> (impl Debug + '_) {
diff --git a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr
index b6857a6c4c5..443ffeb55cd 100644
--- a/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr
+++ b/src/test/ui/impl-trait/impl-fn-hrtb-bounds.stderr
@@ -1,5 +1,5 @@
 error[E0106]: missing lifetime specifier
-  --> $DIR/impl-fn-hrtb-bounds.rs:22:38
+  --> $DIR/impl-fn-hrtb-bounds.rs:19:38
    |
 LL | fn d() -> impl Fn() -> (impl Debug + '_) {
    |                                      ^^ expected named lifetime parameter
@@ -22,57 +22,30 @@ note: lifetime declared here
 LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
    |                   ^
 
-error: lifetime may not live long enough
-  --> $DIR/impl-fn-hrtb-bounds.rs:6:9
-   |
-LL |     |x| x
-   |      -- ^ returning this value requires that `'1` must outlive `'2`
-   |      ||
-   |      |return type of closure is impl Debug + '2
-   |      has type `&'1 u8`
-
 error: higher kinded lifetime bounds on nested opaque types are not supported yet
-  --> $DIR/impl-fn-hrtb-bounds.rs:10:52
+  --> $DIR/impl-fn-hrtb-bounds.rs:9:52
    |
 LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
    |                                                    ^^
    |
 note: lifetime declared here
-  --> $DIR/impl-fn-hrtb-bounds.rs:10:20
+  --> $DIR/impl-fn-hrtb-bounds.rs:9:20
    |
 LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
    |                    ^^
 
-error: lifetime may not live long enough
-  --> $DIR/impl-fn-hrtb-bounds.rs:12:9
-   |
-LL |     |x| x
-   |      -- ^ returning this value requires that `'1` must outlive `'2`
-   |      ||
-   |      |return type of closure is impl Debug + '2
-   |      has type `&'1 u8`
-
 error: higher kinded lifetime bounds on nested opaque types are not supported yet
-  --> $DIR/impl-fn-hrtb-bounds.rs:16:52
+  --> $DIR/impl-fn-hrtb-bounds.rs:14:52
    |
 LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
    |                                                    ^^
    |
 note: lifetime declared here
-  --> $DIR/impl-fn-hrtb-bounds.rs:16:20
+  --> $DIR/impl-fn-hrtb-bounds.rs:14:20
    |
 LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
    |                    ^^
 
-error: lifetime may not live long enough
-  --> $DIR/impl-fn-hrtb-bounds.rs:18:9
-   |
-LL |     |x| x
-   |      -- ^ returning this value requires that `'1` must outlive `'2`
-   |      ||
-   |      |return type of closure is impl Debug + '2
-   |      has type `&'1 u8`
-
-error: aborting due to 7 previous errors
+error: aborting due to 4 previous errors
 
 For more information about this error, try `rustc --explain E0106`.
diff --git a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs
index a4a1f1dcee1..61303a5b2cb 100644
--- a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs
+++ b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.rs
@@ -5,7 +5,6 @@ fn a() -> impl Fn(&u8) -> impl Debug + '_ {
     //~^ ERROR ambiguous `+` in a type
     //~| ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     |x| x
-    //~^ ERROR lifetime may not live long enough
 }
 
 fn b() -> impl Fn() -> impl Debug + Send {
diff --git a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr
index e18e89700b4..cf6e5ef7bac 100644
--- a/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr
+++ b/src/test/ui/impl-trait/impl-fn-parsing-ambiguities.stderr
@@ -5,7 +5,7 @@ LL | fn a() -> impl Fn(&u8) -> impl Debug + '_ {
    |                           ^^^^^^^^^^^^^^^ help: use parentheses to disambiguate: `(impl Debug + '_)`
 
 error: ambiguous `+` in a type
-  --> $DIR/impl-fn-parsing-ambiguities.rs:11:24
+  --> $DIR/impl-fn-parsing-ambiguities.rs:10:24
    |
 LL | fn b() -> impl Fn() -> impl Debug + Send {
    |                        ^^^^^^^^^^^^^^^^^ help: use parentheses to disambiguate: `(impl Debug + Send)`
@@ -22,14 +22,5 @@ note: lifetime declared here
 LL | fn a() -> impl Fn(&u8) -> impl Debug + '_ {
    |                   ^
 
-error: lifetime may not live long enough
-  --> $DIR/impl-fn-parsing-ambiguities.rs:7:9
-   |
-LL |     |x| x
-   |      -- ^ returning this value requires that `'1` must outlive `'2`
-   |      ||
-   |      |return type of closure is impl Debug + '2
-   |      has type `&'1 u8`
-
-error: aborting due to 4 previous errors
+error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/impl-trait/issues/issue-67830.rs b/src/test/ui/impl-trait/issues/issue-67830.rs
index 6dc8935c777..92f7e005dbf 100644
--- a/src/test/ui/impl-trait/issues/issue-67830.rs
+++ b/src/test/ui/impl-trait/issues/issue-67830.rs
@@ -21,8 +21,6 @@ struct A;
 fn test() -> impl for<'a> MyFn<&'a A, Output=impl Iterator + 'a> {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     Wrap(|a| Some(a).into_iter())
-    //~^ ERROR implementation of `FnOnce` is not general enough
-    //~| ERROR implementation of `FnOnce` is not general enough
 }
 
 fn main() {}
diff --git a/src/test/ui/impl-trait/issues/issue-67830.stderr b/src/test/ui/impl-trait/issues/issue-67830.stderr
index cbc7cd54201..d3ea8cb0377 100644
--- a/src/test/ui/impl-trait/issues/issue-67830.stderr
+++ b/src/test/ui/impl-trait/issues/issue-67830.stderr
@@ -10,23 +10,5 @@ note: lifetime declared here
 LL | fn test() -> impl for<'a> MyFn<&'a A, Output=impl Iterator + 'a> {
    |                       ^^
 
-error: implementation of `FnOnce` is not general enough
-  --> $DIR/issue-67830.rs:23:5
-   |
-LL |     Wrap(|a| Some(a).into_iter())
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
-   |
-   = note: closure with signature `fn(&'2 A) -> std::option::IntoIter<&A>` must implement `FnOnce<(&'1 A,)>`, for any lifetime `'1`...
-   = note: ...but it actually implements `FnOnce<(&'2 A,)>`, for some specific lifetime `'2`
-
-error: implementation of `FnOnce` is not general enough
-  --> $DIR/issue-67830.rs:23:5
-   |
-LL |     Wrap(|a| Some(a).into_iter())
-   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
-   |
-   = note: closure with signature `fn(&'2 A) -> std::option::IntoIter<&A>` must implement `FnOnce<(&'1 A,)>`, for any lifetime `'1`...
-   = note: ...but it actually implements `FnOnce<(&'2 A,)>`, for some specific lifetime `'2`
-
-error: aborting due to 3 previous errors
+error: aborting due to previous error
 
diff --git a/src/test/ui/impl-trait/issues/issue-88236-2.rs b/src/test/ui/impl-trait/issues/issue-88236-2.rs
index f4354d1b2ae..fde8a6704cc 100644
--- a/src/test/ui/impl-trait/issues/issue-88236-2.rs
+++ b/src/test/ui/impl-trait/issues/issue-88236-2.rs
@@ -18,16 +18,11 @@ fn make_impl() -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {}
 fn make_weird_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     &()
-    //~^ ERROR implementation of `Hrtb` is not general enough
-    //~| ERROR implementation of `Hrtb` is not general enough
 }
 
 fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
     //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
     x
-    //~^ ERROR implementation of `Hrtb` is not general enough
-    //~| ERROR implementation of `Hrtb` is not general enough
-    //~| ERROR lifetime may not live long enough
 }
 
 fn main() {}
diff --git a/src/test/ui/impl-trait/issues/issue-88236-2.stderr b/src/test/ui/impl-trait/issues/issue-88236-2.stderr
index 99c91d16a64..8605d07abe9 100644
--- a/src/test/ui/impl-trait/issues/issue-88236-2.stderr
+++ b/src/test/ui/impl-trait/issues/issue-88236-2.stderr
@@ -22,71 +22,17 @@ note: lifetime declared here
 LL | fn make_weird_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
    |                                               ^^
 
-error: implementation of `Hrtb` is not general enough
-  --> $DIR/issue-88236-2.rs:20:5
-   |
-LL |     &()
-   |     ^^^ implementation of `Hrtb` is not general enough
-   |
-   = note: `Hrtb<'0>` would have to be implemented for the type `&()`, for any lifetime `'0`...
-   = note: ...but `Hrtb<'1>` is actually implemented for the type `&'1 ()`, for some specific lifetime `'1`
-
-error: implementation of `Hrtb` is not general enough
-  --> $DIR/issue-88236-2.rs:20:5
-   |
-LL |     &()
-   |     ^^^ implementation of `Hrtb` is not general enough
-   |
-   = note: `Hrtb<'0>` would have to be implemented for the type `&()`, for any lifetime `'0`...
-   = note: ...but `Hrtb<'1>` is actually implemented for the type `&'1 ()`, for some specific lifetime `'1`
-
 error: higher kinded lifetime bounds on nested opaque types are not supported yet
-  --> $DIR/issue-88236-2.rs:25:78
+  --> $DIR/issue-88236-2.rs:23:78
    |
 LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
    |                                                                              ^^
    |
 note: lifetime declared here
-  --> $DIR/issue-88236-2.rs:25:45
+  --> $DIR/issue-88236-2.rs:23:45
    |
 LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
    |                                             ^^
 
-error: lifetime may not live long enough
-  --> $DIR/issue-88236-2.rs:27:5
-   |
-LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> {
-   |                  -- lifetime `'b` defined here
-LL |
-LL |     x
-   |     ^ returning this value requires that `'b` must outlive `'static`
-   |
-help: to declare that `impl for<'a> Hrtb<'a, Assoc = impl Send + 'static>` captures data from argument `x`, you can add an explicit `'b` lifetime bound
-   |
-LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a> + 'b {
-   |                                                                                  ++++
-help: to declare that `impl Send + 'a` captures data from argument `x`, you can add an explicit `'b` lifetime bound
-   |
-LL | fn make_bad_impl<'b>(x: &'b ()) -> impl for<'a> Hrtb<'a, Assoc = impl Send + 'a + 'b> {
-   |                                                                                 ++++
-
-error: implementation of `Hrtb` is not general enough
-  --> $DIR/issue-88236-2.rs:27:5
-   |
-LL |     x
-   |     ^ implementation of `Hrtb` is not general enough
-   |
-   = note: `Hrtb<'0>` would have to be implemented for the type `&()`, for any lifetime `'0`...
-   = note: ...but `Hrtb<'1>` is actually implemented for the type `&'1 ()`, for some specific lifetime `'1`
-
-error: implementation of `Hrtb` is not general enough
-  --> $DIR/issue-88236-2.rs:27:5
-   |
-LL |     x
-   |     ^ implementation of `Hrtb` is not general enough
-   |
-   = note: `Hrtb<'0>` would have to be implemented for the type `&()`, for any lifetime `'0`...
-   = note: ...but `Hrtb<'1>` is actually implemented for the type `&'1 ()`, for some specific lifetime `'1`
-
-error: aborting due to 8 previous errors
+error: aborting due to 3 previous errors
 
diff --git a/src/test/ui/impl-trait/issues/issue-92305.rs b/src/test/ui/impl-trait/issues/issue-92305.rs
index 1518c116b31..4a89238d07e 100644
--- a/src/test/ui/impl-trait/issues/issue-92305.rs
+++ b/src/test/ui/impl-trait/issues/issue-92305.rs
@@ -4,11 +4,10 @@ use std::iter;
 
 fn f<T>(data: &[T]) -> impl Iterator<Item = Vec> {
     //~^ ERROR: missing generics for struct `Vec` [E0107]
-    iter::empty() //~ ERROR: type annotations needed [E0282]
+    iter::empty()
 }
 
 fn g<T>(data: &[T], target: T) -> impl Iterator<Item = Vec<T>> {
-    //~^ ERROR: type annotations needed [E0282]
     f(data).filter(|x| x == target)
 }
 
diff --git a/src/test/ui/impl-trait/issues/issue-92305.stderr b/src/test/ui/impl-trait/issues/issue-92305.stderr
index e8575b76b09..34d5c2d61dc 100644
--- a/src/test/ui/impl-trait/issues/issue-92305.stderr
+++ b/src/test/ui/impl-trait/issues/issue-92305.stderr
@@ -14,24 +14,6 @@ help: add missing generic argument
 LL | fn f<T>(data: &[T]) -> impl Iterator<Item = Vec<T>> {
    |                                             ~~~~~~
 
-error[E0282]: type annotations needed
-  --> $DIR/issue-92305.rs:7:5
-   |
-LL |     iter::empty()
-   |     ^^^^^^^^^^^ cannot infer type of the type parameter `T` declared on the function `empty`
-   |
-help: consider specifying the generic argument
-   |
-LL |     iter::empty::<T>()
-   |                +++++
-
-error[E0282]: type annotations needed
-  --> $DIR/issue-92305.rs:10:35
-   |
-LL | fn g<T>(data: &[T], target: T) -> impl Iterator<Item = Vec<T>> {
-   |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot infer type
-
-error: aborting due to 3 previous errors
+error: aborting due to previous error
 
-Some errors have detailed explanations: E0107, E0282.
-For more information about an error, try `rustc --explain E0107`.
+For more information about this error, try `rustc --explain E0107`.
diff --git a/src/test/ui/impl-trait/nested-rpit-hrtb.rs b/src/test/ui/impl-trait/nested-rpit-hrtb.rs
index 377658b95c9..a5db10d3a22 100644
--- a/src/test/ui/impl-trait/nested-rpit-hrtb.rs
+++ b/src/test/ui/impl-trait/nested-rpit-hrtb.rs
@@ -31,11 +31,9 @@ fn one_hrtb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl Qux<'a>> {}
 
 fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
 //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
-//~| ERROR implementation of `Bar` is not general enough
 
 fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
 //~^ ERROR higher kinded lifetime bounds on nested opaque types are not supported yet
-//~| ERROR the trait bound `&(): Qux<'static>` is not satisfied
 
 // This should resolve.
 fn one_hrtb_mention_fn_trait_param<'b>() -> impl for<'a> Foo<'a, Assoc = impl Qux<'b>> {}
@@ -45,11 +43,9 @@ fn one_hrtb_mention_fn_outlives<'b>() -> impl for<'a> Foo<'a, Assoc = impl Sized
 
 // This should resolve.
 fn one_hrtb_mention_fn_trait_param_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Qux<'b>> {}
-//~^ ERROR the trait bound `&(): Qux<'b>` is not satisfied
 
 // This should resolve.
 fn one_hrtb_mention_fn_outlives_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'b> {}
-//~^ ERROR implementation of `Bar` is not general enough
 
 // This should resolve.
 fn two_htrb_trait_param() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Qux<'b>> {}
@@ -60,11 +56,9 @@ fn two_htrb_outlives() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Sized + 'b>
 
 // This should resolve.
 fn two_htrb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Qux<'b>> {}
-//~^ ERROR the trait bound `for<'b> &(): Qux<'b>` is not satisfied
 
 // `'b` is not in scope for the outlives bound.
 fn two_htrb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Sized + 'b> {}
 //~^ ERROR use of undeclared lifetime name `'b` [E0261]
-//~| ERROR implementation of `Bar` is not general enough
 
 fn main() {}
diff --git a/src/test/ui/impl-trait/nested-rpit-hrtb.stderr b/src/test/ui/impl-trait/nested-rpit-hrtb.stderr
index fb2a7445357..3dbe6ebadfb 100644
--- a/src/test/ui/impl-trait/nested-rpit-hrtb.stderr
+++ b/src/test/ui/impl-trait/nested-rpit-hrtb.stderr
@@ -1,5 +1,5 @@
 error[E0261]: use of undeclared lifetime name `'b`
-  --> $DIR/nested-rpit-hrtb.rs:58:77
+  --> $DIR/nested-rpit-hrtb.rs:54:77
    |
 LL | fn two_htrb_outlives() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Sized + 'b> {}
    |                                                                             ^^ undeclared lifetime
@@ -15,7 +15,7 @@ LL | fn two_htrb_outlives<'b>() -> impl for<'a> Foo<'a, Assoc = impl for<'b> Siz
    |                     ++++
 
 error[E0261]: use of undeclared lifetime name `'b`
-  --> $DIR/nested-rpit-hrtb.rs:66:82
+  --> $DIR/nested-rpit-hrtb.rs:61:82
    |
 LL | fn two_htrb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Sized + 'b> {}
    |                                                                                  ^^ undeclared lifetime
@@ -65,70 +65,18 @@ note: lifetime declared here
 LL | fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
    |                                         ^^
 
-error: implementation of `Bar` is not general enough
-  --> $DIR/nested-rpit-hrtb.rs:32:78
-   |
-LL | fn one_hrtb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'a> {}
-   |                                                                              ^^ implementation of `Bar` is not general enough
-   |
-   = note: `()` must implement `Bar<'0>`, for any lifetime `'0`...
-   = note: ...but it actually implements `Bar<'1>`, for some specific lifetime `'1`
-
 error: higher kinded lifetime bounds on nested opaque types are not supported yet
-  --> $DIR/nested-rpit-hrtb.rs:36:73
+  --> $DIR/nested-rpit-hrtb.rs:35:73
    |
 LL | fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
    |                                                                         ^^
    |
 note: lifetime declared here
-  --> $DIR/nested-rpit-hrtb.rs:36:44
+  --> $DIR/nested-rpit-hrtb.rs:35:44
    |
 LL | fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
    |                                            ^^
 
-error[E0277]: the trait bound `&(): Qux<'static>` is not satisfied
-  --> $DIR/nested-rpit-hrtb.rs:36:64
-   |
-LL | fn one_hrtb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl Qux<'a>> {}
-   |                                                                ^^^^^^^^^^^^ the trait `Qux<'static>` is not implemented for `&()`
-   |
-   = help: the trait `Qux<'_>` is implemented for `()`
-
-error[E0277]: the trait bound `&(): Qux<'b>` is not satisfied
-  --> $DIR/nested-rpit-hrtb.rs:47:79
-   |
-LL | fn one_hrtb_mention_fn_trait_param_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Qux<'b>> {}
-   |                                                                               ^^^^^^^^^^^^ the trait `Qux<'b>` is not implemented for `&()`
-   |
-   = help: the trait `Qux<'_>` is implemented for `()`
-
-error: implementation of `Bar` is not general enough
-  --> $DIR/nested-rpit-hrtb.rs:51:93
-   |
-LL | fn one_hrtb_mention_fn_outlives_uses<'b>() -> impl for<'a> Bar<'a, Assoc = impl Sized + 'b> {}
-   |                                                                                             ^^ implementation of `Bar` is not general enough
-   |
-   = note: `()` must implement `Bar<'0>`, for any lifetime `'0`...
-   = note: ...but it actually implements `Bar<'1>`, for some specific lifetime `'1`
-
-error[E0277]: the trait bound `for<'b> &(): Qux<'b>` is not satisfied
-  --> $DIR/nested-rpit-hrtb.rs:62:64
-   |
-LL | fn two_htrb_trait_param_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Qux<'b>> {}
-   |                                                                ^^^^^^^^^^^^^^^^^^^^ the trait `for<'b> Qux<'b>` is not implemented for `&()`
-   |
-   = help: the trait `Qux<'_>` is implemented for `()`
-
-error: implementation of `Bar` is not general enough
-  --> $DIR/nested-rpit-hrtb.rs:66:86
-   |
-LL | fn two_htrb_outlives_uses() -> impl for<'a> Bar<'a, Assoc = impl for<'b> Sized + 'b> {}
-   |                                                                                      ^^ implementation of `Bar` is not general enough
-   |
-   = note: `()` must implement `Bar<'0>`, for any lifetime `'0`...
-   = note: ...but it actually implements `Bar<'1>`, for some specific lifetime `'1`
-
-error: aborting due to 12 previous errors
+error: aborting due to 6 previous errors
 
-Some errors have detailed explanations: E0261, E0277.
-For more information about an error, try `rustc --explain E0261`.
+For more information about this error, try `rustc --explain E0261`.