1 files changed, 51 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr b/src/test/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr
new file mode 100644
index 000000000..f5143762d
--- /dev/null
+++ b/src/test/ui/suggestions/suggest-swapping-self-ty-and-trait.stderr
@@ -0,0 +1,51 @@
+error[E0404]: expected trait, found struct `Struct`
+  --> $DIR/suggest-swapping-self-ty-and-trait.rs:10:13
+   |
+LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
+   |             ^^^^^^^^^ not a trait
+   |
+help: `impl` items mention the trait being implemented first and the type it is being implemented for second
+   |
+LL | impl<'a, T> Trait<'a, T> for Struct<T> {}
+   |             ~~~~~~~~~~~~     ~~~~~~~~~
+
+error[E0404]: expected trait, found enum `Enum`
+  --> $DIR/suggest-swapping-self-ty-and-trait.rs:15:13
+   |
+LL | impl<'a, T> Enum<T> for Trait<'a, T> {}
+   |             ^^^^^^^ not a trait
+   |
+help: `impl` items mention the trait being implemented first and the type it is being implemented for second
+   |
+LL | impl<'a, T> Trait<'a, T> for Enum<T> {}
+   |             ~~~~~~~~~~~~     ~~~~~~~
+
+error[E0404]: expected trait, found union `Union`
+  --> $DIR/suggest-swapping-self-ty-and-trait.rs:18:13
+   |
+LL | impl<'a, T> Union<T> for Trait<'a, T> {}
+   |             ^^^^^^^^ not a trait
+   |
+help: `impl` items mention the trait being implemented first and the type it is being implemented for second
+   |
+LL | impl<'a, T> Trait<'a, T> for Union<T> {}
+   |             ~~~~~~~~~~~~     ~~~~~~~~
+
+warning: trait objects without an explicit `dyn` are deprecated
+  --> $DIR/suggest-swapping-self-ty-and-trait.rs:10:27
+   |
+LL | impl<'a, T> Struct<T> for Trait<'a, T> {}
+   |                           ^^^^^^^^^^^^
+   |
+   = note: `#[warn(bare_trait_objects)]` on by default
+   = warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
+   = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
+help: use `dyn`
+   |
+LL - impl<'a, T> Struct<T> for Trait<'a, T> {}
+LL + impl<'a, T> Struct<T> for dyn Trait<'a, T> {}
+   |
+
+error: aborting due to 3 previous errors; 1 warning emitted
+
+For more information about this error, try `rustc --explain E0404`.