leak.rs

extern crate glib;
extern crate gtk;

extern crate glib_sys;
extern crate gobject_sys;
extern crate gtk_sys;

use glib::translate::ToGlibPtr;

fn meh() -> *const gobject_sys::GObject {
    let button = gtk::Button::new();

    let c = button.clone();
    let stash = c.to_glib_none();
    let ptr: *const gtk_sys::GtkButton = stash.0;

    ptr as *const gobject_sys::GObject
}

fn main() {
    gtk::init().unwrap();

    let ptr = meh();
    println!("{:?}", unsafe { *(&(*ptr).ref_count as *const glib_sys::Volatile<u32> as *const u32) });
}