Traceback (most recent call last):


 "/Applications/Thonny.app/Contents/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/thonny/plugins/micropython/backend.py", line 103, in __init__

self._prepare(clean)


 "/Applications/Thonny.app/Contents/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/thonny/plugins/micropython/backend.py", line 120, in _prepare

self._builtin_modules = self._fetch_builtin_modules()


 "/Applications/Thonny.app/Contents/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/thonny/plugins/micropython/backend.py", line 174, in _fetch_builtin_modules

assert not err, "Error was: %r" % err
AssertionError: Error was: 'Traceback (most recent call last):\r\n

 "<stdin>", line 1, in <module>\r\nNameError: name \'help\' isn\'t defined\r\n'

Traceback (most recent call last):


 "fonttools", line 11, in <module>

sys.exit(main())


 "fontTools/__main__.py", line 29, in main

runpy.run_module(mod, run_name='__main__')


 "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py", line 208, in run_module

return _run_code(code, {}, init_globals, run_name, mod_spec)


 "/usr/local/Cellar/python/3.7.1/Frameworks/Python.framework/Versions/3.7/lib/python3.7/runpy.py", line 85, in _run_code

exec(code, run_globals)


 "fontTools/varLib/__main__.py", line 7, in <module>

sys.exit(main())


 "fontTools/varLib/__init__.py", line 1075, in main

optimize=options.optimize


 "fontTools/varLib/__init__.py", line 916, in build

_merge_OTL(vf, model, master_fonts, axisTags)


 "fontTools/varLib/__init__.py", line 688, in _merge_OTL

merger.mergeTables(font, master_fonts, ['GSUB', 'GDEF', 'GPOS'])


 "fontTools/varLib/merger.py", line 108, in mergeTables

for m in master_ttfs])


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 94, in mergeThings

self.mergeObjects(out, lst)


 "fontTools/varLib/merger.py", line 73, in mergeObjects

mergerFunc(self, value, values)


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 94, in mergeThings

self.mergeObjects(out, lst)


 "fontTools/varLib/merger.py", line 73, in mergeObjects

mergerFunc(self, value, values)


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 94, in mergeThings

self.mergeObjects(out, lst)


 "fontTools/varLib/merger.py", line 73, in mergeObjects

mergerFunc(self, value, values)


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 96, in mergeThings

self.mergeLists(out, lst)


 "fontTools/varLib/merger.py", line 82, in mergeLists

self.mergeThings(value, values)


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 92, in mergeThings

mergerFunc(self, out, lst)


 "fontTools/varLib/merger.py", line 755, in merge

merger.mergeLists(self.SubTable, subtables)


 "fontTools/varLib/merger.py", line 82, in mergeLists

self.mergeThings(value, values)


 "fontTools/varLib/merger.py", line 950, in mergeThings

super(VariationMerger, self).mergeThings(out, lst)


 "fontTools/varLib/merger.py", line 92, in mergeThings

mergerFunc(self, out, lst)


 "fontTools/varLib/merger.py", line 623, in merge

_MarkBasePosFormat1_merge(self, lst, merger)


 "fontTools/varLib/merger.py", line 611, in _MarkBasePosFormat1_merge

merger.mergeThings(anchor, allAnchors)


 "fontTools/varLib/merger.py", line 947, in mergeThings

model, lst = masterModel.getSubModel(lst)


 "fontTools/varLib/models.py", line 219, in getSubModel

subModel = VariationModel(subList(key, self.origLocations), self.axisOrder)


 "fontTools/varLib/models.py", line 203, in __init__

keyFunc = self.getMasterLocationsSortKeyFunc(locations, axisOrder=self.axisOrder)


 "fontTools/varLib/models.py", line 225, in getMasterLocationsSortKeyFunc

assert {} in locations, "Base master not found."
AssertionError: ('Base master not found.', 'MarkBasePos', '[0]', 'Lookup', '[6]', 'list', '.Lookup', 'LookupList', '.LookupList', 'GPOS', '.table', 'table_G_P_O_S_')
