================
@@ -2237,6 +2237,9 @@ Parser::ParsePostfixExpressionSuffix(ExprResult LHS) {
if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
RunSignatureHelp();
LHS = ExprError();
+ } else if (!HasError && HasTrailingComma) {
+ // FIXME: add a FIXIT to remove the trailing comma.
+ Diag(Tok, diag::err_extraneous_trailing_comma);
----------------
cor3ntin wrote:
I think we should just reuse `err_expected_expression`. The important point
here is that there is a diagnostic.
Note sure this happens often enough to warrant a fixit
https://github.com/llvm/llvm-project/pull/125232
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