Parser.java contains the following at line 2206:

{code}
if (token.kind == RBRACKET) {
    elemtype = bracketsOptCont(elemtype, pos, maybeDimAnnos);
} else {
    if (token.kind == RBRACKET) { // no dimension
        elemtype = bracketsOptCont(elemtype, pos, maybeDimAnnos);
    } else {
        dimAnnotations.append(maybeDimAnnos);
        dims.append(parseExpression());
        accept(RBRACKET);
    }
}
{code}

It seems that the inner if is always false.