[clang] [clang-tools-extra] [clang] fix diagnostic printing of expressions ignoring LangOpts (PR #134693)

[Matheus Izvekov via cfe-commits]

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@@ -493,8 +493,8 @@ DeduceNullPtrTemplateArgument(Sema &S, TemplateParameterList *TemplateParams,
                                                         : CK_NullToPointer)
                     .get();
   return DeduceNonTypeTemplateArgument(
-      S, TemplateParams, NTTP, DeducedTemplateArgument(Value), Value->getType(),
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mizvekov wrote:

Yeah, Value is an expression, but the DeducedTemplateArgument constructor only (implicitly) accepts a TemplateArgument. Instead of `DeducedTemplateArgument(TemplateArgument(Value))`, we go through the implicit path, as it is harmless.

https://github.com/llvm/llvm-project/pull/134693