[clang] [Clang] Prevent null pointer dereference in designated initializer check (PR #97220)

[via cfe-commits]

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@@ -3206,9 +3206,11 @@ ExprResult SemaObjC::BuildInstanceMessage(
     }
     if (!isDesignatedInitChain) {
       const ObjCMethodDecl *InitMethod = nullptr;
+      auto *CurMD = SemaRef.getCurMethodDecl();
+      if (!CurMD)
+        return ExprResult((Expr *)nullptr);
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smanna12 wrote:

Thank you @tahonermann for review and feedback. I have added an assert.

https://github.com/llvm/llvm-project/pull/97220