PC crashes.. autobackup bug "gdk-pixbuf-error"

guys i really need your help omg :frowning:

my pc crashes and i cant recover duo a bug :@

here some stuff

Mypaint version: 1.2.0+git

File "C:\Program Files\MyPaint\share\mypaint\gui\application.py", line 747, autorecover_cb(self=<gui.application.Application object>, action=<Action object at 0x565b048 (GtkAction at 0x549af10)>)
            autosave_recovery = gui.autorecover.Presenter(self)
            autosave_recovery.run(no_autosaves_dialog=True)
  variables: {'autosave_recovery.run': ('local', <bound method Presenter.run of <gui.autorecover.Presenter object at 0x000000000E07C550>>), 'no_autosaves_dialog': (None, []), 'True': ('builtin', True)}
  File "C:\Program Files\MyPaint\share\mypaint\gui\autorecover.py", line 66, run(self=<gui.autorecover.Presenter object>, no_autosaves_dialog=True)
            autosaves = []
            for asav in lib.document.get_available_autosaves():
                # Another instance may be working in there.
  variables: {'lib.document.get_available_autosaves': ('global', <function get_available_autosaves at 0x0000000005062A58>), 'asav': ('local', AutosaveInfo(path=u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\mypaint\\doc.ibi5xy\\autosave', last_modified=datetime.datetime(2017, 1, 19, 18, 52, 34, 846066), thumbnail=<Pixbuf object at 0xfffa3a8 (GdkPixbuf at 0xad53ae0)>, num_layers=1, unsaved_painting_time=0.0, width=0, height=0, valid=True, cache_in_use=True))}
  File "C:\Program Files\MyPaint\share\mypaint\lib\document.py", line 1715, get_available_autosaves()
            if not os.path.isdir(autosave_path):
                continue
            yield AutosaveInfo.new_for_path(autosave_path)
  variables: {'AutosaveInfo.new_for_path': ('global', <bound method type.new_for_path of <class 'lib.document.AutosaveInfo'>>), 'autosave_path': ('local', u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\mypaint\\doc.qn81j3\\autosave')}
  File "C:\Program Files\MyPaint\share\mypaint\lib\document.py", line 156, new_for_path(cls=<class 'lib.document.AutosaveInfo'>, path=u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Wi...ry Internet Files\\mypaint\\doc.qn81j3\\autosave')
            if os.path.exists(thumbnail_path):
                thumbnail = lib.pixbuf.load_from_file(thumbnail_path)
            cache_in_use = False
  variables: {'lib.pixbuf.load_from_file': ('global', <function load_from_file at 0x0000000004B287B8>), 'thumbnail': ('local', None), 'thumbnail_path': ('local', u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\mypaint\\doc.qn81j3\\autosave\\Thumbnails\\thumbnail.png')}
  File "C:\Program Files\MyPaint\share\mypaint\lib\pixbuf.py", line 91, load_from_file(filename=u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Wi...\doc.qn81j3\\autosave\\Thumbnails\\thumbnail.png', feedback_cb=None)
        with open(filename, 'rb') as fp:
            return load_from_stream(fp, feedback_cb)
  variables: {'feedback_cb': ('local', None), 'load_from_stream': ('global', <function load_from_stream at 0x0000000003EB0EB8>), 'fp': ('local', <closed file u'C:\\Users\\test\\AppData\\Local\\Microsoft\\Windows\\Temporary Internet Files\\mypaint\\doc.qn81j3\\autosave\\Thumbnails\\thumbnail.png', mode 'rb' at 0x00000000095C5300>)}
  File "C:\Program Files\MyPaint\share\mypaint\lib\pixbuf.py", line 114, load_from_stream(fp=<closed file u'C:\\Users\\test\\AppData\\Local\\...\autosave\\Thumbnails\\thumbnail.png', mode 'rb'>, feedback_cb=None)
                break
            loader.write(buf)
        loader.close()
  variables: {'buf': ('local', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'), 'loader.write': ('local', gi.FunctionInfo(write))}
Error: gdk-pixbuf-error-quark: Unrecognized image file format (3)