[clang] [clang] fix sema init crash for not checking a ExprResult (PR #98102)

[Aaron Ballman via cfe-commits]

================
@@ -5576,6 +5576,10 @@ static void TryOrBuildParenListInitialization(
       ExprResult ER;
       ER = IS.Perform(S, SubEntity, SubKind,
                       Arg ? MultiExprArg(Arg) : std::nullopt);
+
+      if (ER.isInvalid())
----------------
AaronBallman wrote:

Ah you are correct, sorry! I see now that the common code pattern *is* to check 
`isInvalid()` on the returned result.

https://github.com/llvm/llvm-project/pull/98102
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