diff --git a/App/lib/core/StubMerger.vp b/App/lib/core/StubMerger.vp
index dd7fa11..2f68b75 100644
--- a/App/lib/core/StubMerger.vp
+++ b/App/lib/core/StubMerger.vp
@@ -1758,6 +1758,13 @@ def _BuildReachableSha1Set(mb: memhub.MemBuddy | t.CPtr, source_dir: str,
                             tr.CurrentPackage = HandlesImports.compute_package_from_relpath(mb, fname)
                             HandlesStruct.reset_visible_structs(mb, 0)
                             tr.translate(tree)
+                            # 容器使用检测：App 源文件用 list/dict（裸名注解/构造/[]
+                            # /{} 字面量）时注入 _list/_dict 依赖（与 Phase1 对 includes
+                            # 层的 _ScanTreeForContainers 对齐）。否则 dict/list 类未被
+                            # 纳入可达集合 → 不编译 → 跨模块方法（如 dict.set_int）返回
+                            # 类型函数/text.ll/vpi 均未命中 → _fail_method_ret_ty 误杀
+                            # （DictTest 8/13 重现根因）。
+                            tr._inject_auto_container_visibility(mb, tree)
                             # 获取 _imported_modules
                             if tr._imported_modules is not None:
                                 im_len: t.CSizeT = string.strlen(tr._imported_modules)