crashing constantly

[ecann7]

Description

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Steps to reproduce

Please tell us what you were doing when the error message popped up. If you can provide step-by-step instructions on how to reproduce the bug, that's even better.

Traceback

Mypaint version: 2.0.0-alpha+git.55678ec2
System information: Windows-10-10.0.22000-SP0
Using: Python 2.7.16, GTK 3.24.9, GdkPixbuf 2.38.1, Cairo 1.16.0, GLib 2.60.4
Traceback (most recent call last):
  File "C:/Program Files/WindowsApps/D5BE6627.UltraPaint_2.0.3.0_x86__9pm2v9747qaaa/mingw32/lib/mypaint/gui/layers.py", line 517, _button_press_cb(self=<layers.RootStackTreeView object at 0x108b1148 (gui+layers+RootStackTreeView at 0x0e3e4ce8)>, view=<layers.RootStackTreeView object at 0x108b1148 (gui+layers+RootStackTreeView at 0x0e3e4ce8)>, event=<Gdk.EventButton object at 0x18a6fab0 (void at 0x12fa6a58)>)
            if click_layerpath != self._docmodel.layer_stack.current_path:
                self._docmodel.select_layer(path=click_layerpath)
                self.current_layer_changed()
  variables: {'click_layerpath': ('local', (4,)), 'self._docmodel.select_layer': ('local', <bound method Document.select_layer of <Document nlayers=6 bbox=Rect(704, 320, 8128, 4160) paintonly=False>>), 'path': (None, [])}
  File "C:/Program Files/WindowsApps/D5BE6627.UltraPaint_2.0.3.0_x86__9pm2v9747qaaa/mingw32/lib/mypaint/lib/document.py", line 943, select_layer(self=<Document nlayers=6 bbox=Rect(704, 320, 8128, 4160) paintonly=False>, index=None, path=(4,), layer=None)
                                        usecurrent=False, usefirst=True)
            self.do(command.SelectLayer(self, path=sel_path))
  variables: {'self.do': ('local', <bound method Document.do of <Document nlayers=6 bbox=Rect(704, 320, 8128, 4160) paintonly=False>>), 'command.SelectLayer': ('global', <class 'lib.command.SelectLayer'>), 'self': ('local', <Document nlayers=6 bbox=Rect(704, 320, 8128, 4160) paintonly=False>), 'sel_path': ('local', (4,)), 'path': ('local', (4,))}
  File "C:/Program Files/WindowsApps/D5BE6627.UltraPaint_2.0.3.0_x86__9pm2v9747qaaa/mingw32/lib/mypaint/lib/command.py", line 1028, __init__(self=<Select Layer>, doc=<Document nlayers=6 bbox=Rect(704, 320, 8128, 4160) paintonly=False>, index=None, path=(4,), layer=None, **kwds={})
            self.path = layers.canonpath(index=index, path=path, layer=layer)
            self.prev_path = layers.canonpath(path=layers.get_current_path())
  File "C:/Program Files/WindowsApps/D5BE6627.UltraPaint_2.0.3.0_x86__9pm2v9747qaaa/mingw32/lib/mypaint/lib/layer/tree.py", line 1870, canonpath(self=<RootLayerStack len=6 u'Root'>, index=None, layer=<RootLayerStack len=6 u'Root'>, path=(), usecurrent=False, usefirst=False)
                    raise ValueError("path=%r is root: must be descendent" %
                                     (path,))
                if layer is not None:
  variables: {'path': ('local', ())}
ValueError: path=() is root: must be descendent