Segfault on Save images from the select pages

Open a pdf (from scanner) containing a single page.
Select the page.
Clic on "Save image from the selected pages to a new folder" button.
PDFMod window is closed, with following message in terminal :

draco@draco-ultrabook:~$ pdfmod
[1 Debug 10:03:17.029] Starting PdfMod 0.9.1
[1 Debug 10:03:17.049] Initializing i18n catalog from /usr/share/locale/
[1 Debug 10:03:17.075] Loaded custom AccelMap from /home/draco/.config/pdfmod/gtk_accel_map
[1 Debug 10:03:17.085] Cache directory set to /home/draco/.cache/pdfmod

(PdfMod:15060): GLib-GObject-WARNING **: Attempt to add property __gtksharp_3_PdfMod_Gui_PageCell::page after class was initialised
[1 Debug 10:03:28.786] Loaded /home/draco/xxx.pdf
Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) Gdk.Pixbuf.gdk_pixbuf_save (intptr,intptr,intptr,intptr&,intptr) <0xffffffff>
  at Gdk.Pixbuf.Save (string,string) <0x0006b>
  at PdfMod.Pdf.Actions.ExportImagesAction.ExportAsPngImage (PdfMod.Pdf.Actions.ExportImagesAction/ImageInfo,string) <0x00123>
  at PdfMod.Pdf.Actions.ExportImagesAction.Export (PdfMod.Pdf.Actions.ExportImagesAction/ImageInfo,string) <0x0018f>
  at PdfMod.Pdf.Actions.ExportImagesAction.Do (string) <0x0005b>
  at PdfMod.Gui.Actions.OnExportImages (object,System.EventArgs) <0x00213>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___object_object (object,intptr,intptr,intptr) <0xffffffff>
  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&) <0xffffffff>
  at System.Reflection.MonoMethod.Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) <0x000db>
  at System.Reflection.MethodBase.Invoke (object,object[]) <0x00032>
  at System.Delegate.DynamicInvokeImpl (object[]) <0x00203>
  at System.MulticastDelegate.DynamicInvokeImpl (object[]) <0x0003b>
  at System.Delegate.DynamicInvoke (object[]) <0x00020>
  at GLib.Signal.ClosureInvokedCB (object,GLib.ClosureInvokedArgs) <0x0014f>
  at GLib.SignalClosure.Invoke (GLib.ClosureInvokedArgs) <0x0002f>
  at GLib.SignalClosure.MarshalCallback (intptr,intptr,uint,intptr,intptr,intptr) <0x0029b>
  at (wrapper native-to-managed) GLib.SignalClosure.MarshalCallback (intptr,intptr,uint,intptr,intptr,intptr) <0xffffffff>
  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) Gtk.Application.gtk_main () <0xffffffff>
  at Gtk.Application.Run () <0x0000b>
  at PdfMod.Gui.Client..ctor (bool) <0x00aa7>
  at PdfMod.PdfMod.Main (string[]) <0x000fb>
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

 mono() [0x4b73d8]
 mono() [0x50f13b]
 mono() [0x423d22]
 /lib/x86_64-linux-gnu/libpthread.so.0(+0x10340) [0x7f2d067a9340]
 /lib/x86_64-linux-gnu/libc.so.6(+0x97ffe) [0x7f2d0646bffe]
 /lib/x86_64-linux-gnu/libpng12.so.0(png_write_row+0x10f) [0x7f2cfac73bcf]
 /lib/x86_64-linux-gnu/libpng12.so.0(png_write_rows+0x31) [0x7f2cfac73de1]
 /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-png.so(+0x24ab) [0x7f2cc59f14ab]
 /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-png.so(+0x25dc) [0x7f2cc59f15dc]
 /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0(gdk_pixbuf_savev+0xd6) [0x7f2d02aad766]
 /usr/lib/x86_64-linux-gnu/libgdk_pixbuf-2.0.so.0(gdk_pixbuf_save+0x108) [0x7f2d02aada48]
 [0x40e70273]

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: Opération non permise.
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.
=================================================================

Abandon
---
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CurrentDesktop: XFCE
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2015-06-18 (132 days ago)
InstallationMedia: Xubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
Package: pdfmod 0.9.1-7
PackageArchitecture: all
ProcVersionSignature: Ubuntu 3.16.0-50.67~14.04.1-generic 3.16.7-ckt16
Tags: trusty third-party-packages
Uname: Linux 3.16.0-50-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo users vboxusers
_MarkForUpload: True