Some invalid array/object subscriptions are accepted

[zline]

I expect this tests to pass:

@Test(expected = InvalidPathException.class)
public void test1() {
    compile("$[0, 1, 2 4]");
}

@Test(expected = InvalidPathException.class)
public void test2() {
    compile("$['1','2',]");
}

@Test(expected = InvalidPathException.class)
public void test3() {
    compile("$['1', ,'3']");
}