fix: handle with type bounds in existing_params

Author: roife

crates/ide-assists/src/utils/suggest_name.rs

@@ -70,8 +70,13 @@ pub(crate) fn for_unique_generic_name(
     name: &str,
     existing_params: &ast::GenericParamList,
 ) -> SmolStr {
-    let param_names = existing_params.generic_params().map(|param| param.to_string()).collect_vec();
-
+    let param_names = existing_params
+        .generic_params()
+        .map(|param| match param {
+            ast::GenericParam::TypeParam(t) => t.name().unwrap().to_string(),
+            p => p.to_string(),
+        })
+        .collect_vec();
     let mut name = name.to_string();
     let base_len = name.len();
     // 4*len bytes for base, and 2 bytes for 2 digits