refactor(tpv): set_asan_mode 移除改直接赋 _asan_mode bool；ClassGenEnum 加 Renum 字段 0xb0 崩溃定位临时诊断（定位后移除）

App/lib/core/Gen/ClassGenEnum.vp

@@ -878,6 +878,31 @@ class ClassGenEnum(ClassGenBase.ClassGenBase):
             string.memset(self.RenumVariantTags, 0, 8 * RENUM_CLASS_MAX * RENUM_VARIANT_PER_CLASS)
             self.RenumClassCount = 0
 
+        # ============ 临时诊断（0xb0 崩溃定位，定位后移除） ============
+        # lazy init 后 RenumClassNames 必非空；此时若 RCV 异常（null/小值）
+        # 说明字段被越界覆盖或 __init__ 未生效，fail-fast 暴露崩溃现场。
+        fb_diag: str = VLogger.fmt_buf()
+        if fb_diag is not None:
+            viperlib.snprintf(fb_diag, 1024,
+                "[RENUM-DIAG] self=%llu RN=%llu RCV=%llu RVN=%llu RVT=%llu RCount=%d class=%s",
+                t.CUInt64T(self), t.CUInt64T(self.RenumClassNames),
+                t.CUInt64T(self.RenumClassVariantCounts),
+                t.CUInt64T(self.RenumVariantNames),
+                t.CUInt64T(self.RenumVariantTags),
+                self.RenumClassCount, class_name)
+            VLogger.info(fb_diag, "RENUM")
+        rcv_chk: t.CUInt64T = t.CUInt64T(self.RenumClassVariantCounts)
+        if rcv_chk == 0 or rcv_chk < 4096:
+            fb_fail: str = VLogger.fmt_buf()
+            if fb_fail is not None:
+                viperlib.snprintf(fb_fail, 1024,
+                    "[RENUM-FAIL] RCV=%llu 异常（lazy init 后应为 perm_pool 地址），RenumClassCount=%d class=%s",
+                    t.CUInt64T(self.RenumClassVariantCounts),
+                    self.RenumClassCount, class_name)
+                VLogger.error(fb_fail, "RENUM")
+            stdlib.exit(1)
+        # ============ 临时诊断结束 ============
+
         # 检查是否已注册（避免重复注册）
         for i in range(self.RenumClassCount):
             existing: str = self.RenumClassNames[i]

App/main.vp

@@ -258,7 +258,7 @@ Target: %s
     # includes 缓存用独立目录 .binary_asan 隔离 asan 插桩 obj，避免与非 asan obj 混链
     # （asan obj 引用 __asan_init 等符号，非 asan 链接不提供 asan 库 → undefined reference）
     if args.get_bool("asan"):
-        BuildPipeline.set_asan_mode(1)
+        BuildPipeline._asan_mode = True
         Config.set_inc_bin_suffix(".binary_asan")
         if log is not None:
             log.info("ASan 模式已启用（opt -passes=asan + libclang_rt）", "asan")
@@ -272,7 +272,7 @@ Target: %s
                     viperlib.snprintf(fb_asan, 1024, "ASan 模式清理 includes 缓存: %d 个文件（将重建 asan obj）", n_asan)
                     log.info(fb_asan, "asan")
     else:
-        BuildPipeline.set_asan_mode(0)
+        BuildPipeline._asan_mode = False
         Config.set_inc_bin_suffix(".binary")
 
     # --nowarn-register：抑制"外部函数返回类型未登记"类 WARN 输出