Traceback (most recent call last):


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/mesonmain.py", line 298, in run

app.generate()


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/mesonmain.py", line 180, in generate

intr.run()


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreter.py", line 2529, in run

super().run()


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 125, in run

self.evaluate_codeblock(self.ast, start=1)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 146, in evaluate_codeblock

raise e


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 140, in evaluate_codeblock

self.evaluate_statement(cur)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 153, in evaluate_statement

return self.assignment(cur)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 566, in assignment

value = self.evaluate_statement(node.value)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 151, in evaluate_statement

return self.function_call(cur)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreterbase.py", line 372, in function_call

return self.funcs[func_name](node, self.flatten(posargs), kwargs)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreter.py", line 1493, in func_run_command

self.subdir, in_builddir)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreter.py", line 77, in __init__

pc, self.stdout, self.stderr = self.run_command(command_array, source_dir, build_dir, subdir, in_builddir)


 "/home/zbyszek/.local/lib/python3.5/site-packages/meson-0.40.0.dev1-py3.5.egg/mesonbuild/interpreter.py", line 95, in run_command

mlog.debug('Running command:', ' '.join(command_array))
TypeError: sequence item 0: expected str instance, NoneType found

Traceback (most recent call last):


 "d:\python\python36-32\lib\site-packages\pip\basecommand.py", line 215, in main

status = self.run(options, args)


 "d:\python\python36-32\lib\site-packages\pip\commands\install.py", line 324, in run

requirement_set.prepare_files(finder)


 "d:\python\python36-32\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files

ignore_dependencies=self.ignore_dependencies))


 "d:\python\python36-32\lib\site-packages\pip\req\req_set.py", line 666, in _prepare_file

check_dist_requires_python(dist)


 "d:\python\python36-32\lib\site-packages\pip\utils\packaging.py", line 48, in check_dist_requires_python

feed_parser.feed(metadata)


 "d:\python\python36-32\lib\email\feedparser.py", line 175, in feed

self._input.push(data)


 "d:\python\python36-32\lib\email\feedparser.py", line 103, in push

self._partial.write(data)
TypeError: string argument expected, got 'NoneType'