diff --git a/lib/core/Handles/HandlesExprCall.py b/lib/core/Handles/HandlesExprCall.py
index 892ff57..a7c4f73 100644
--- a/lib/core/Handles/HandlesExprCall.py
+++ b/lib/core/Handles/HandlesExprCall.py
@@ -3018,6 +3018,13 @@ class ExprCallHandle(BaseHandle):
         spec_cache = getattr(Gen, '_generic_class_specializations', {})
         cached = spec_cache.get(spec_key)
         if not isinstance(cached, tuple) or len(cached) < 2:
+            # 缓存中还没有该特化：直接从头生成完整特化（方法体随类特化一起产出）
+            try:
+                self.Trans.ClassHandler._specialize_generic_class(
+                    base_name, ClassName[len(base_name) + 1:-1].split(']['),
+                    Gen, declare_only=False)
+            except Exception:
+                pass
             return
         cached_name: str = cached[0]
         was_declare_only: bool = cached[1]