[clang] Fix: Issue #165239 — resolve -Wuninitialized warnings (PR #166991)

[Yanzuo Liu via cfe-commits]

================
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -Wall -Wextra -Wuninitialized -fsyntax-only %s 2>&1 | FileCheck %s
----------------
zwuis wrote:

Please read <https://clang.llvm.org/docs/InternalsManual.html#verifying-diagnostics>.

https://github.com/llvm/llvm-project/pull/166991