Public bug reported:

MyPaint gives this error at startup:

A programming error has been detected.

It probably isn't fatal, but the details should be reported to the
developers nonetheless.

Traceback (most recent call last):
  File "/usr/share/mypaint/gui/tileddrawwidget.py", line 161, 
enter_notify_cb(self=<TiledDrawWidget object at 0x1a28500 (GtkEventBox at 
0x1c73b40)>, widget=<TiledDrawWidget object at 0x1a28500 (GtkEventBox at 
0x1c73b40)>, event=<gtk.gdk.Event at 0x2040918: GDK_ENTER_NOTIFY x=127.00, 
y=96.00, mode=GDK_CROSSING_NORMAL>)
            # Ensure the cursor reflects layer-locking changes etc.
            self.renderer.update_cursor()
  variables: {'self.renderer.update_cursor': ('local', <bound method 
CanvasRenderer.update_cursor of <CanvasRenderer object at 0x1a28550 
(GtkDrawingArea at 0x19cc2c0)>>)}
  File "/usr/share/mypaint/gui/tileddrawwidget.py", line 340, 
update_cursor(self=<CanvasRenderer object at 0x1a28550 (GtkDrawingArea at 
0x19cc2c0)>)
                radius, style = self._get_cursor_info()
                c = cursor.get_brush_cursor(radius, style, self.app.preferences)
            window.set_cursor(c)
  variables: {'self.app.preferences': ('local', {'frame.color_rgba': [0.12, 
0.12, 0.12, 0.92], 'view.high_quality_zoom': True, 'ui.feedback.scale': True, 
'ui.feedback.last_pos': False, u'colors.current': u'#292929', 
'brushmanager.selected_groups': [u'set#2'], 'ui.toolbar_items': 
{u'toolbar1_file': True, u'toolbar1_view_modes': True, u'toolbar1_subwindows': 
True, u'toolbar1_edit': True, u'toolbar1_blendmodes': False, 
u'toolbar1_view_manips': False, u'toolbar1_view_resets': True, 
u'toolbar1_scrap': False, u'toolbar1_linemodes': False}, 
'input.button_mapping': {u'<Primary>Button1': u'ColorPickMode', 
u'<Primary>Button2': u'ZoomViewMode', u'<Primary><Shift>Button2': 
u'FrameEditMode', u'<Shift>Button1': u'StraightMode', u'<Shift>Button2': 
u'RotateViewMode', u'Button3': u'ShowPopupMenu', u'Button2': u'PanViewMode', 
u'<Shift><Alt>Button2': u'FrameEditMode', u'<Alt>Button2': u'ZoomViewMode', 
u'<Alt>Button1': u'ColorPickMode'}, 'view.default_zoom': 1.0, 
'misc.context_restores_color': True, 'ui
 .parts': {u'main_toolbar': True, u'menubar': True}, 
'ui.hide_toolbar_in_fullscreen': True, 'input.device_mode': u'screen', 
'layout.window_positions': {'brushSelectionWindow': {u'h': 350, u'sbindex': 2, 
u'sbheight': 350, u'w': 250, u'y': -150, u'x': -100, u'hidden': True, 
u'floating': True}, 'inputTestWindow': {}, 'brushSettingsWindow': {u'y': -128, 
u'h': 300, u'w': 300, u'x': -460}, 'colorWindow': {u'h': 300, u'sbindex': 0, 
u'sbheight': 300, u'w': 250, u'y': 125, u'x': -100, u'hidden': True, 
u'floating': True}, 'layersWindow': {u'h': 200, u'sbindex': 3, u'sbheight': 
200, u'w': 200, u'y': -150, u'x': -460, u'hidden': True, u'floating': True}, 
'backgroundWindow': {}, 'preferencesWindow': {}, 'scratchWindow': {u'h': 250, 
u'sbindex': 4, u'sbheight': 250, u'w': 300, u'y': 125, u'x': -555, u'hidden': 
True, u'floating': True}, 'frameWindow': {}, 'main-window': {u'y': 32, u'h': 
668, u'w': 1180, u'sbwidth': 250, u'x': 50}}, u'linemode.exit_pressure': 
0.30000000000000004, 'ui.hide_subwindows_
 in_fullscreen': True, u'linemode.entry_pressure': 0.30000000000000004, 
u'colors.history': [u'#ee3333', u'#336699', u'#44aa66', u'#aa6633', 
u'#292929'], 'saving.scrap_prefix': u'~/MyPaint/scrap', 
'ui.hide_menubar_in_fullscreen': True, 'input.global_pressure_mapping': [[0.0, 
1.0], [1.0, 0.0]], 'saving.default_format': u'openraster', 
'ui.feedback.symmetry': True, 'brushmanager.selected_brush': 
u'deevad/2B_pencil', 'scratchpad.last_opened_scratchpad': 
u'/home/moustafa/.mypaint/scratchpads/autosave.ora', u'devbrush.last_used': 
u'Wacom Intuos5 touch M Pen stylus'}), 'c': (None, []), 'style': ('local', 0), 
'radius': ('local', 7.38905609893065), 'cursor.get_brush_cursor': ('global', 
<function get_brush_cursor at 0x19c4aa0>)}
  File "/usr/share/mypaint/gui/cursor.py", line 57, 
get_brush_cursor(radius=7.38905609893065, style=0, 
prefs={'brushmanager.selected_brush': u'deevad/2B_pencil', 
'brushmanager.selected_groups': [u'set#2'], u'colors.current': u'#292929', 
u'colors.history': [u'#ee3333', u'#336699', u'#44aa66', u'#aa6633', 
u'#292929'], u'devbrush.last_used': u'Wacom Intuos5 touch M Pen stylus', 
'frame.color_rgba': [0.12, 0.12, 0.12, 0.92], 'input.button_mapping': 
{u'<Alt>Button1': u'ColorPickMode', u'<Alt>Button2': u'ZoomViewMode', 
u'<Primary><Shift>Button2': u'FrameEditMode', u'<Primary>Button1': 
u'ColorPickMode', u'<Primary>Button2': u'ZoomViewMode', u'<Shift><Alt>Button2': 
u'FrameEditMode', u'<Shift>Button1': u'StraightMode', u'<Shift>Button2': 
u'RotateViewMode', u'Button2': u'PanViewMode', u'Button3': u'ShowPopupMenu'}, 
'input.device_mode': u'screen', 'input.global_pressure_mapping': [[0.0, 1.0], 
[1.0, 0.0]], 'layout.window_positions': {'backgroundWindow': {}, 
'brushSelectionWindow': {u'floating': T
 rue, u'h': 350, u'hidden': True, u'sbheight': 350, u'sbindex': 2, u'w': 250, 
u'x': -100, u'y': -150}, 'brushSettingsWindow': {u'h': 300, u'w': 300, u'x': 
-460, u'y': -128}, 'colorWindow': {u'floating': True, u'h': 300, u'hidden': 
True, u'sbheight': 300, u'sbindex': 0, u'w': 250, u'x': -100, u'y': 125}, 
'frameWindow': {}, 'inputTestWindow': {}, 'layersWindow': {u'floating': True, 
u'h': 200, u'hidden': True, u'sbheight': 200, u'sbindex': 3, u'w': 200, u'x': 
-460, u'y': -150}, 'main-window': {u'h': 668, u'sbwidth': 250, u'w': 1180, 
u'x': 50, u'y': 32}, 'preferencesWindow': {}, 'scratchWindow': {u'floating': 
True, u'h': 250, u'hidden': True, u'sbheight': 250, u'sbindex': 4, u'w': 300, 
u'x': -555, u'y': 125}}, ...})
            hot_x = hot_y = int((d+1)/2)
            pixbuf = image_surface_to_pixbuf(surf)
            if pygtkcompat.USE_GTK3:
  variables: {'surf': ('local', <cairo.ImageSurface object at 0x7f399fdb0d70>), 
'image_surface_to_pixbuf': ('global', <function image_surface_to_pixbuf at 
0x19c4b18>), 'pixbuf': (None, [])}
  File "/usr/share/mypaint/gui/cursor.py", line 76, 
image_surface_to_pixbuf(surf=<cairo.ImageSurface object>)
        png_dp = StringIO()
        surf.write_to_png(png_dp)
        pixbuf_loader = gdk.PixbufLoader()
  variables: {'png_dp': ('local', <cStringIO.StringO object at 0x2469420>), 
'surf.write_to_png': ('local', <built-in method write_to_png of 
cairo.ImageSurface object at 0x7f399fdb0d70>)}
IOError: error while writing to output stream

=========================

I suspect the change to Mir/XMir to be the cause, but I'm really unsure
as to why these  errors appear.

** Affects: mypaint (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: mir mypaint saucy xmir

** Summary changed:

- Programming error at startup
+ Programming error at startup in Ubuntu 13.10

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https://bugs.launchpad.net/bugs/1230105

Title:
  Programming error at startup in Ubuntu 13.10

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