Crash when coping part of the images inside Images palette

I wasn't able to reproduce this crash with the latest development build on Ubuntu 11.10, but I'll try it on Windows and see what happens.

I have tried the latest development created from source on Ubuntu 11.10 and the problem is exactly the same.
Notes:
- before step 3 I have created a print screen pressing <Print Screen> key,
- after step 3 there is additional question if I would like to expand canvas, so I selected "Expand canvas" button.

I have run Pinta from terminal. Terminal output is.
*** Start of terminal output ***
Stacktrace:

  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0xffffffff>
  at Gtk.Application.Run () <0x0000b>
  at Pinta.MainClass.Main (string[]) <0x0059b>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

 /usr/bin/mono() [0x80e126c]
 /usr/bin/mono() [0x812046c]
 /usr/bin/mono() [0x805fe7d]
 [0x4002040c]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x2483d3) [0x410723d3]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x23b11a) [0x4106511a]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x23bb90) [0x41065b90]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x252804) [0x4107c804]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x2561c2) [0x410801c2]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x138c52) [0x40f62c52]
 /usr/lib/i386-linux-gnu/libgobject-2.0.so.0(+0xb68d) [0x4179168d]
 /usr/lib/i386-linux-gnu/libgobject-2.0.so.0(g_closure_invoke+0x1ac) [0x41792c3c]
 /usr/lib/i386-linux-gnu/libgobject-2.0.so.0(+0x1f838) [0x417a5838]
 /usr/lib/i386-linux-gnu/libgobject-2.0.so.0(g_signal_emit_valist+0x589) [0x417ae599]
 /usr/lib/i386-linux-gnu/libgobject-2.0.so.0(g_signal_emit+0x33) [0x417ae8f3]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(+0x272553) [0x4109c553]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(gtk_propagate_event+0xce) [0x40f60eae]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(gtk_main_do_event+0x2c0) [0x40f61240]
 /usr/lib/i386-linux-gnu/libgdk-x11-2.0.so.0(+0x57888) [0x412ea888]
 /lib/i386-linux-gnu/libglib-2.0.so.0(g_main_context_dispatch+0x1df) [0x4181d25f]
 /lib/i386-linux-gnu/libglib-2.0.so.0(+0x43990) [0x4181d990]
 /lib/i386-linux-gnu/libglib-2.0.so.0(g_main_loop_run+0x14b) [0x4181df9b]
 /usr/lib/i386-linux-gnu/libgtk-x11-2.0.so.0(gtk_main+0xaf) [0x40f5ffcf]
 [0x441bfb38]
 [0x441bfafc]
 [0x4075d354]
 [0x4075d567]
 /usr/bin/mono() [0x8064afc]

Debug info from gdb:

Could not attach to process. If your uid matches the uid of the target
process, check the setting of /proc/sys/kernel/yama/ptrace_scope, or try
again as the root user. For more details, see /etc/sysctl.d/10-ptrace.conf
ptrace: Operation not permitted.
No threads.

=================================================================
Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

make: *** [run] Aborted

*** End of terminal output ***

It looks to me like a mono crash. On Windows (see attachment from first post) I also see different window then usual Pinta window crash. On Pinta I have executed "mono --version" command and got output:

***
Mono JIT compiler version 2.10.5 (Debian 2.10.5-1)
Copyright (C) 2002-2011 Novell, ...

Just an update, on Windows I use:
- Microsoft .NET Framework 4
- Gtk# for .Net 2.12.10

On Windows I have now uninstalled Gtk# for .Net 2.12.10 and installed Gtk# for .Net 2.12.9-2 as recommended by official Pinta web site. The same crash appears.

On Windows I have also tried to uninstall Gtk# for .Net 2.12.9-2 and installed mono package http://download.mono-project.com/archive/2.10.8/windows-installer/1/mono-2.10.8-gtksharp-2.12.11-win32-1.exe which includes Gtk# 2.12.11 and Pinta even crashes when it starts up.

OK, I am seeing this crash now on Ubuntu 11.10 with those steps

Bumping to high priority.

I did several tests on Windows XP:
1. Uninstalled current Pinta and installed Pinta 1.1. Repeating steps above and Pinta works fine!
2. Uninstalled current Pinta and installed Pinta 1.2-development preview. Repeating steps above and problem appears.
3. Uninstalled current Pinta and installed Pinta 1.2 official release. Problem persists.
4. Uninstalling current Pinta and installed pinta-1.3-preview-20120426.msi. Problem persists.

It looks like this bug is a regression that happened with some update between Pinta 1.1 and Pinta 1.2-development preview. Can you please check what updates where introduced between this two release. I am using multiple pictures and copy/pasting a lot, so this regression makes me cry. ;)

As far as I can tell, this only happens when switching images by using the Open Images pad (things seem to work fine using the Window menu)

Looks like this was introduced when image previews were added to the Open Images pad (https://github.com/PintaProject/Pinta/commit/d24ddc12306f62a319fbddd804a93338ecc138bc)

Fixed: https://github.com/PintaProject/Pinta/commit/3bf9defda60b316534fcf480ac31750c2988ea52

I tested latest Pinta development on Ubuntu 12.04 and problem is fixed. Thanks.