Account for suggestions for complete removal of lines

Fix  #94192.

2 files changed, 113 insertions, 0 deletions

diff --git a/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.rs b/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.rs
new file mode 100644
index 00000000000..56aed77c10e
--- /dev/null
+++ b/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.rs
@@ -0,0 +1,30 @@
+struct Wrapper<T>(T);
+
+fn foo<T>(foo: Wrapper<T>)
+//~^ ERROR the size for values of type `T` cannot be known at compilation time
+where
+    T
+    :
+    ?
+    Sized
+{
+    //
+}
+
+fn bar<T>(foo: Wrapper<T>)
+//~^ ERROR the size for values of type `T` cannot be known at compilation time
+where T: ?Sized
+{
+    //
+}
+
+fn qux<T>(foo: Wrapper<T>)
+//~^ ERROR the size for values of type `T` cannot be known at compilation time
+where
+    T: ?Sized
+{
+    //
+}
+
+
+fn main() {}
diff --git a/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.stderr b/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.stderr
new file mode 100644
index 00000000000..3df17056ef4
--- /dev/null
+++ b/src/test/ui/suggestions/removal-of-multiline-trait-bound-in-where-clause.stderr
@@ -0,0 +1,83 @@
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:3:16
+   |
+LL | fn foo<T>(foo: Wrapper<T>)
+   |        -       ^^^^^^^^^^ doesn't have a size known at compile-time
+   |        |
+   |        this type parameter needs to be `std::marker::Sized`
+   |
+note: required by a bound in `Wrapper`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^ required by this bound in `Wrapper`
+help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^  - ...if indirection were used here: `Box<T>`
+   |                |
+   |                this could be changed to `T: ?Sized`...
+help: consider removing the `?Sized` bound to make the type parameter `Sized`
+   |
+LL - where
+LL -     T
+LL -     :
+LL -     ?
+LL -     Sized
+   | 
+
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:14:16
+   |
+LL | fn bar<T>(foo: Wrapper<T>)
+   |        -       ^^^^^^^^^^ doesn't have a size known at compile-time
+   |        |
+   |        this type parameter needs to be `std::marker::Sized`
+   |
+note: required by a bound in `Wrapper`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^ required by this bound in `Wrapper`
+help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^  - ...if indirection were used here: `Box<T>`
+   |                |
+   |                this could be changed to `T: ?Sized`...
+help: consider removing the `?Sized` bound to make the type parameter `Sized`
+   |
+LL - where T: ?Sized
+   | 
+
+error[E0277]: the size for values of type `T` cannot be known at compilation time
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:21:16
+   |
+LL | fn qux<T>(foo: Wrapper<T>)
+   |        -       ^^^^^^^^^^ doesn't have a size known at compile-time
+   |        |
+   |        this type parameter needs to be `std::marker::Sized`
+   |
+note: required by a bound in `Wrapper`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^ required by this bound in `Wrapper`
+help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
+  --> $DIR/removal-of-multiline-trait-bound-in-where-clause.rs:1:16
+   |
+LL | struct Wrapper<T>(T);
+   |                ^  - ...if indirection were used here: `Box<T>`
+   |                |
+   |                this could be changed to `T: ?Sized`...
+help: consider removing the `?Sized` bound to make the type parameter `Sized`
+   |
+LL - where
+LL -     T: ?Sized
+   | 
+
+error: aborting due to 3 previous errors
+
+For more information about this error, try `rustc --explain E0277`.