Diagnostics vs. optional argument skipping

[Simn]

trafficstars

function test(?x:String,  ?e:haxe.macro.Expr.ExprDef) {}

function main() {
	test(EBreak);
}

This complains about Unknown identifier : EBreak. Should be very similar to #10633.

[Simn]

My fix for this doesn't work. I think the problem is that due to the potentially delayed nature of our typing, disabling the report mode like this might affect various other typing attempts.