[DRE-maint] Bug#840909: ruby-gdk-pixbuf2: cannot overwrite Pixbuf.pixels with substitution

[Shyouzou Sugitani]

Package: ruby-gdk-pixbuf2
Version: 3.0.9-1
Severity: normal

Dear Maintainer,

I'm trying to make ninix-aya work with Ruby-GNOME2 3.0.9.
But I found that I cannot overwrite Pixbuf.pixels with substitution.

pix = GdkPixbuf::Pixbuf.new(:file => "test.png")
pix.pixels[0]
=> 0
pix.pixels[0] = 255
=> 255
pix.pixels[0]
=> 0

In 2.2.5 I can modify GdkPixbuf through pixels. 
Is there any API change?

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=ja_JP.utf8, LC_CTYPE=ja_JP.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages ruby-gdk-pixbuf2 depends on:
ii  gir1.2-gdkpixbuf-2.0        2.36.0-1
ii  ruby                        1:2.3.0+4
ii  ruby-gio2                   3.0.9-1
ii  ruby-gobject-introspection  3.0.9-1

ruby-gdk-pixbuf2 recommends no packages.

ruby-gdk-pixbuf2 suggests no packages.

-- no debconf information