Issue with declaring hash and functions with curly braces on newline

[api33tiramisu]

To reproduce:

In Stylus, functions and declarations can be written with or without the curly braces. Hashes do.

body {
    background: red;
}

hash = {
   foo: bar;
}

add(a, b) {
    a + b;
}

In other languages, I can also put the first brace on a newline, but not here in Stylus. This issue won't occur for declarations.

/* This works */

body
{
    background: red;
}

/* These don't work */

hash =
{
    foo: bar;
}

add(a, b)
{
    a + b;
}

Current behaviour:

Stylus will throw an error this.nodes[0] is undefined for functions and Expected "{" but found "" for hashes.

Expected behaviour:

Stylus won't throw any issue and I can declare functions and hashes as usual.

Environment information:

• stylus version: 0.58.1
• nodejs version: n/a

I use the Stylus extension version 1.5.38 for Firefox.