Don't suggest adding Self as a type parameter

Author: compiler-errors

compiler/rustc_resolve/src/late/diagnostics.rs

@@ -1807,7 +1807,7 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
         path: &[Segment],
     ) -> Option<(Span, &'static str, String, Applicability)> {
         let (ident, span) = match path {
-            [segment] if !segment.has_generic_args => {
+            [segment] if !segment.has_generic_args && segment.ident.name != kw::SelfUpper => {
                 (segment.ident.to_string(), segment.ident.span)
             }
             _ => return None,

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

@@ -2,9 +2,8 @@ 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
-   |      |       |
-   |      |       help: you might be missing a type parameter: `, Self`
+   |      -----                  ^^^^ `Self` is only available in impls, traits, and type definitions
+   |      |
    |      `Self` not allowed in a type alias
 
 error: aborting due to previous error