Auto merge of #72378 - Dylan-DPC:rollup-m87bp2d, r=Dylan-DPC

Rollup of 6 pull requests

Successful merges:

 - #71863 (Suggest fixes and add error recovery for `use foo::self`)
 - #72139 (Make `fold` standalone.)
 - #72275 (Continue lowering for unsupported async generator instead of returning an error.)
 - #72361 (split_inclusive: add tracking issue number (72360))
 - #72364 (Remove unused dependencies)
 - #72366 (Adjust the zero check in `RawVec::grow`.)

Failed merges:

r? @ghost

src/test/ui/error-codes/E0429.stderr

@@ -1,8 +1,17 @@
 error[E0429]: `self` imports are only allowed within a { } list
-  --> $DIR/E0429.rs:1:5
+  --> $DIR/E0429.rs:1:13
    |
 LL | use std::fmt::self;
-   |     ^^^^^^^^^^^^^^
+   |             ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use std::fmt;
+   |            --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use std::fmt::{self};
+   |               ^    ^
 
 error: aborting due to previous error
 

src/test/ui/issues/issue-45829/import-self.rs

@@ -9,7 +9,7 @@ use foo::{self};
 use foo as self;
 //~^ ERROR expected identifier
 
-use foo::self;
+use foo::self; //~ ERROR is defined multiple times
 //~^ ERROR `self` imports are only allowed within a { } list
 
 use foo::A;

src/test/ui/issues/issue-45829/import-self.stderr

@@ -5,10 +5,19 @@ LL | use foo as self;
    |            ^^^^ expected identifier, found keyword
 
 error[E0429]: `self` imports are only allowed within a { } list
-  --> $DIR/import-self.rs:12:5
+  --> $DIR/import-self.rs:12:8
    |
 LL | use foo::self;
-   |     ^^^^^^^^^
+   |        ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use foo;
+   |       --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use foo::{self};
+   |          ^    ^
 
 error[E0255]: the name `foo` is defined multiple times
   --> $DIR/import-self.rs:6:11
@@ -25,6 +34,21 @@ help: you can use `as` to change the binding name of the import
 LL | use foo::{self as other_foo};
    |           ^^^^^^^^^^^^^^^^^
 
+error[E0255]: the name `foo` is defined multiple times
+  --> $DIR/import-self.rs:12:5
+   |
+LL | mod foo {
+   | ------- previous definition of the module `foo` here
+...
+LL | use foo::self;
+   |     ^^^^^^^^^ `foo` reimported here
+   |
+   = note: `foo` must be defined only once in the type namespace of this module
+help: you can use `as` to change the binding name of the import
+   |
+LL | use foo as other_foo;
+   |     ^^^^^^^^^^^^^^^^
+
 error[E0252]: the name `A` is defined multiple times
   --> $DIR/import-self.rs:16:11
    |
@@ -39,7 +63,7 @@ help: you can use `as` to change the binding name of the import
 LL | use foo::{self as OtherA};
    |           ^^^^^^^^^^^^^^
 
-error: aborting due to 4 previous errors
+error: aborting due to 5 previous errors
 
 Some errors have detailed explanations: E0252, E0255, E0429.
 For more information about an error, try `rustc --explain E0252`.

src/test/ui/use/use-keyword.stderr

@@ -2,7 +2,7 @@ error[E0429]: `self` imports are only allowed within a { } list
   --> $DIR/use-keyword.rs:6:13
    |
 LL |         use self as A;
-   |             ^^^^^^^^^
+   |             ^^^^
 
 error[E0432]: unresolved import `super`
   --> $DIR/use-keyword.rs:8:13

src/test/ui/use/use-mod/use-mod-4.stderr

@@ -1,20 +1,38 @@
 error[E0429]: `self` imports are only allowed within a { } list
-  --> $DIR/use-mod-4.rs:1:5
+  --> $DIR/use-mod-4.rs:1:8
    |
 LL | use foo::self;
-   |     ^^^^^^^^^
+   |        ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use foo;
+   |       --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use foo::{self};
+   |          ^    ^
 
 error[E0429]: `self` imports are only allowed within a { } list
-  --> $DIR/use-mod-4.rs:4:5
+  --> $DIR/use-mod-4.rs:4:13
    |
 LL | use std::mem::self;
-   |     ^^^^^^^^^^^^^^
+   |             ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use std::mem;
+   |            --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use std::mem::{self};
+   |               ^    ^
 
 error[E0432]: unresolved import `foo`
   --> $DIR/use-mod-4.rs:1:5
    |
 LL | use foo::self;
-   |     ^^^ maybe a missing crate `foo`?
+   |     ^^^^^^^^^ no `foo` in the root
 
 error: aborting due to 3 previous errors
 

src/test/ui/use/use-mod/use-mod-5.rs

@@ -0,0 +1,13 @@
+mod foo {
+    pub mod bar {
+        pub fn drop() {}
+    }
+}
+
+use foo::bar::self;
+//~^ ERROR `self` imports are only allowed within a { } list
+
+fn main() {
+    // Because of error recovery this shouldn't error
+    bar::drop();
+}

src/test/ui/use/use-mod/use-mod-5.stderr

@@ -0,0 +1,18 @@
+error[E0429]: `self` imports are only allowed within a { } list
+  --> $DIR/use-mod-5.rs:7:13
+   |
+LL | use foo::bar::self;
+   |             ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use foo::bar;
+   |            --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use foo::bar::{self};
+   |               ^    ^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0429`.

src/test/ui/use/use-mod/use-mod-6.rs

@@ -0,0 +1,13 @@
+mod foo {
+    pub mod bar {
+        pub fn drop() {}
+    }
+}
+
+use foo::bar::self as abc;
+//~^ ERROR `self` imports are only allowed within a { } list
+
+fn main() {
+    // Because of error recovery this shouldn't error
+    abc::drop();
+}

src/test/ui/use/use-mod/use-mod-6.stderr

@@ -0,0 +1,18 @@
+error[E0429]: `self` imports are only allowed within a { } list
+  --> $DIR/use-mod-6.rs:7:13
+   |
+LL | use foo::bar::self as abc;
+   |             ^^^^^^
+   |
+help: consider importing the module directly
+   |
+LL | use foo::bar as abc;
+   |            --
+help: alternatively, use the multi-path `use` syntax to import `self`
+   |
+LL | use foo::bar::{self as abc};
+   |               ^           ^
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0429`.