Auto merge of #12199 - jonas-schievink:no-invalid-assoc-ty-completions, r=jonas-schievink

fix: Don't show assoc. type binding completions when invalid

Fixes https://github.com/rust-lang/rust-analyzer/issues/12165

crates/ide-completion/src/completions/type.rs

@@ -165,6 +165,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
             if let Some(ImmediateLocation::GenericArgList(arg_list)) = &ctx.completion_location {
                 if let Some(path_seg) = arg_list.syntax().parent().and_then(ast::PathSegment::cast)
                 {
+                    if path_seg.syntax().ancestors().find_map(ast::TypeBound::cast).is_some() {
                         if let Some(hir::PathResolution::Def(hir::ModuleDef::Trait(trait_))) =
                             ctx.sema.resolve_path(&path_seg.parent_path())
                         {
@@ -177,6 +178,7 @@ pub(crate) fn complete_type_path(acc: &mut Completions, ctx: &CompletionContext)
                         }
                     }
                 }
+            }
             ctx.process_all_names(&mut |name, def| {
                 if scope_def_applicable(def) {
                     acc.add_resolution(ctx, name, def);

crates/ide-completion/src/tests/type_pos.rs

@@ -393,6 +393,38 @@ fn foo<'lt, T: Trait2<self::$0>, const CONST_PARAM: usize>(_: T) {}
     );
 }
 
+#[test]
+fn no_assoc_completion_outside_type_bounds() {
+    check(
+        r#"
+struct S;
+trait Tr<T> {
+    type Ty;
+}
+
+impl Tr<$0
+    "#,
+        expect![[r#"
+            ct CONST
+            en Enum
+            ma makro!(…) macro_rules! makro
+            md module
+            sp Self
+            st Record
+            st S
+            st Tuple
+            st Unit
+            tt Tr
+            tt Trait
+            un Union
+            bt u32
+            kw crate::
+            kw self::
+            kw super::
+        "#]],
+    );
+}
+
 #[test]
 fn enum_qualified() {
     check(