<Haxe> Crash on runtime using assignment of Dynamic to a fixed type

Main.hx

class Main {
    static function main(){
        var aString : Dynamic = "a string";
        var anArrayOfStrings : Dynamic = ["array", "of", "strings"];

        var correctlyTypedVar:Array<String> = anArrayOfStrings;
        var incorrectlyTypedVar:Array<String> = aString;

        //Type.typeof(correctlyTypedVar) // This is an Array at runtime
        //Type.typeof(incorrectlyTypedVar) // This is a String at runtime

        //trace (correctlyTypedVar.length); // 3
        //trace (incorrectlyTypedVar.length); // 8

        for (i in correctlyTypedVar) { // Outputs the array values as expected
            trace (i);
        }

        for (i in incorrectlyTypedVar) { // This crashes silently cuz strings do not have iterators
            trace (i);
        }

        trace ( "Finished" ); // This never happens
    }
}

When using Dynamic, behavior is undefined, i.e. it will depend on the target platform.