diff --git a/includes/_withcontent.vp b/includes/_withcontent.vp
index 394a0bc..8906900 100644
--- a/includes/_withcontent.vp
+++ b/includes/_withcontent.vp
@@ -73,6 +73,8 @@ def _find_provider(field_name: str) -> t.CPtr:
     stack: _ProviderStack | t.CPtr = _get_stack()
     stdio.printf("[wdbg] find field=%s top=%lu\n", field_name, stack.top)
     for i in range(stack.top - 1, -1, -1):
+        stdio.printf("[wdbg] find cmp i=%d names_ptr=%p names_str=%s field=%s\n",
+                     i, stack.names[i], (str)(stack.names[i]), field_name)
         # 字段名用 strcmp 内容比较：编译器对每次 create_global_string 生成
         # 独立的字符串常量（TPV 不去重），push/find 的指针地址不同，
         # 指针 == 永假会导致 provider 匹配失败（__mbuddy__ 注入不上）。