[clang] [clang][CodeGen] Check initializer of zero-size fields for nullptr (PR #109271)

[Michael Buch via cfe-commits]

================
@@ -738,7 +738,7 @@ bool ConstStructBuilder::Build(const InitListExpr *ILE, bool AllowOverwrite) {
     // Zero-sized fields are not emitted, but their initializers may still
     // prevent emission of this struct as a constant.
     if (isEmptyFieldForLayout(CGM.getContext(), Field)) {
-      if (Init->HasSideEffects(CGM.getContext()))
+      if (Init && Init->HasSideEffects(CGM.getContext()))
----------------
Michael137 wrote:

Thanks for confirming. I'll put up a PR for that separately. Though we'll still have to go ahead with this null check, for the non-C23 case (unless we want to extend this logic for the GNU extension too?)

https://github.com/llvm/llvm-project/pull/109271