[clang] [clang][dataflow]Use cast_or_null instead cast to prevent crash (PR #68510)

[Qizhi Hu via cfe-commits]

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@@ -599,7 +599,7 @@ void transferAssignment(const CXXOperatorCallExpr *E, 
BoolValue &HasValueVal,
                         LatticeTransferState &State) {
   assert(E->getNumArgs() > 0);
 
-  if (auto *Loc = cast<RecordStorageLocation>(
+  if (auto *Loc = dyn_cast_or_null<RecordStorageLocation>(
----------------
jcsxky wrote:

updated

https://github.com/llvm/llvm-project/pull/68510
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