Attribute error if python="^3.5" but not with python="*" in 0.9.0.a2 #84
Description
clean new project, tested under python 3.5, 3.6 and poetry 0.9.0.a2
poetry add isort produce the following error message if python version is specified but it's ok if python="*"
I only have the issue with isort
[AttributeError]
'NoneType' object has no attribute 'name'
Exception trace:
/usr/lib/python3.6/site-packages/poetry/_vendor/cleo/application.py in run() at line 94
status_code = self.do_run(input_, output_)
/usr/lib/python3.6/site-packages/poetry/console/application.py in do_run() at line 84
return super(Application, self).do_run(i, o)
/usr/lib/python3.6/site-packages/poetry/_vendor/cleo/application.py in do_run() at line 197
status_code = command.run(input_, output_)
/usr/lib/python3.6/site-packages/poetry/console/commands/command.py in run() at line 77
return super(BaseCommand, self).run(i, o)
/usr/lib/python3.6/site-packages/poetry/_vendor/cleo/commands/base_command.py in run() at line 146
status_code = self.execute(input_, output_)
/usr/lib/python3.6/site-packages/poetry/_vendor/cleo/commands/command.py in execute() at line 107
return self.handle()
/usr/lib/python3.6/site-packages/poetry/console/commands/add.py in handle() at line 129
status = installer.run()
/usr/lib/python3.6/site-packages/poetry/installation/installer.py in run() at line 73
self._do_install(local_repo)
/usr/lib/python3.6/site-packages/poetry/installation/installer.py in _do_install() at line 171
ops = solver.solve(request, fixed=fixed)
/usr/lib/python3.6/site-packages/poetry/puzzle/solver.py in solve() at line 48
vertex, requested
/usr/lib/python3.6/site-packages/poetry/puzzle/solver.py in _get_tags_for_vertex() at line 142
if req.name == vertex.payload.name:
add [-D|--dev] [--git GIT] [--path PATH] [--optional] [--allow-prereleases] [--dry-run] [--] <name> (<name>)...