ECheckType and implicit conversion issue, haxe r6518

Main.hx

package ;

abstract MyAbstract(Int) {
    public function new(v:Int) this = v;
	@:from static function fromString(s:String) return new MyAbstract(Std.parseInt(s));
}
class Main {
	#if !macro
	static function main() {
		var d:Dynamic = test();
		trace(Std.is(d, Int));//false
		var d:MyAbstract = test();
		trace(Std.is(d, Int));//false
		var d:MyAbstract = '5';
		trace(Std.is(d, Int));//true
	}
	#end
	macro static function test() {
		return {
			expr: haxe.macro.Expr.ExprDef.ECheckType(macro '5', macro: Main.MyAbstract),
			pos: haxe.macro.Context.currentPos()
		};
	}
}