Blessed tests.

Author: Alexander Regueiro

src/test/ui/type-alias/issue-62263-self-in-atb.stderr

@@ -0,0 +1,9 @@
+error[E0433]: failed to resolve: use of undeclared type or module `Self`
+  --> $DIR/issue-62263-self-in-atb.rs:5:32
+   |
+LL | pub type Alias = dyn Trait<A = Self::A>;
+   |                                ^^^^ use of undeclared type or module `Self`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/type-alias/issue-62305-self-assoc-ty.stderr

@@ -0,0 +1,9 @@
+error[E0433]: failed to resolve: use of undeclared type or module `Self`
+  --> $DIR/issue-62305-self-assoc-ty.rs:1:14
+   |
+LL | type Alias = Self::Target;
+   |              ^^^^ use of undeclared type or module `Self`
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0433`.

src/test/ui/type-alias/issue-62364-self-ty-arg.stderr

@@ -0,0 +1,9 @@
+error[E0411]: cannot find type `Self` in this scope
+  --> $DIR/issue-62364-self-ty-arg.rs:5:29
+   |
+LL | type Alias<'a> = Struct<&'a Self>;
+   |                             ^^^^ `Self` is only available in impls, traits, and type definitions
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0411`.