Fixed pinned_drop not handling generics correctly

Author: y86-dev

rust/macros/pinned_drop.rs

@@ -17,11 +17,16 @@ pub(crate) fn pinned_drop(_args: TokenStream, input: TokenStream) -> TokenStream
             }
             TokenTree::Punct(p) if p.as_char() == '>' => {
                 nesting = nesting.checked_sub(1).unwrap();
+                continue;
             }
             _ => {}
         }
         if i >= 1 && nesting == 0 {
-            assert!(matches!(tt, TokenTree::Ident(i) if i.to_string() == "PinnedDrop"));
+            assert!(
+                matches!(tt, TokenTree::Ident(i) if i.to_string() == "PinnedDrop"),
+                "expected 'PinnedDrop', found: '{:?}'",
+                tt
+            );
             pinned_drop_idx = Some(i);
             break;
         }