poetry: Poetry add failing with RuntimeError

• I am on the latest Poetry version.
• I have searched the issues of this repo and believe that this is not a duplicate.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: 19.6.0 Darwin Kernel Version 19.6.0: Mon Aug 31 22:12:52 PDT 2020; root:xnu-6153.141.2~1/RELEASE_X86_64 x86_64
• Poetry version: 1.1.3
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/jkary/0d699c7fbfdb340a5448845b69a3d0c2

Issue

When I try to do ‘poetry add’, a RuntimeError is raised. I’ve encountered this issue with different pip modules. Here is the relevant data:

JKARY-M-V80G:svs-alto jkary$ poetry self update
Updating to 1.1.3
 - Downloading poetry-1.1.3-darwin.tar.gz 100%

Poetry (1.1.3) is installed now. Great!
JKARY-M-V80G:svs-alto jkary$ poetry add ansible
Using version ^2.10.1 for ansible

Updating dependencies
Resolving dependencies... (5.1s)

  RuntimeError

  generator didn't stop after throw()

  at ~/.pyenv/versions/3.7.2/lib/python3.7/contextlib.py:161 in __exit__
      157│                 # by 'except BaseException'.
      158│                 if sys.exc_info()[1] is value:
      159│                     return False
      160│                 raise
    → 161│             raise RuntimeError("generator didn't stop after throw()")
      162│
      163│
      164│ class _AsyncGeneratorContextManager(_GeneratorContextManagerBase,
      165│                                     AbstractAsyncContextManager):
JKARY-M-V80G:svs-alto jkary$ poetry --version
Poetry version 1.1.3
JKARY-M-V80G:svs-alto jkary$ python --version
Python 3.7.2
JKARY-M-V80G:svs-alto jkary$ poetry add -vvv ansible
Using virtualenv: /Users/jkary/src/python/svs-alto/.venv
PyPI: No release information found for ansible-1.9.0, skipping
PyPI: No release information found for ansible-2.0.0, skipping
PyPI: 166 packages found for ansible *
Using version ^2.10.1 for ansible

Updating dependencies
Resolving dependencies...
   1: fact: svs-alto is 0.1.0
   1: derived: svs-alto
   1: fact: svs-alto depends on python-xml2dict (^0.1.1)
   1: fact: svs-alto depends on jupyter (^1.0.0)
   1: fact: svs-alto depends on pandas (^1.1.0)
   1: fact: svs-alto depends on openpyxl (^3.0.4)
   1: fact: svs-alto depends on yaml-1.3 (^0.1.0)
   1: fact: svs-alto depends on pyyaml (^5.3.1)
   1: fact: svs-alto depends on json2yaml (^1.1.1)
   1: fact: svs-alto depends on xlrd (^1.2.0)
   1: fact: svs-alto depends on jinja2 (^2.11.2)
   1: fact: svs-alto depends on virl2_client (2.1.0-rc.1 lib/virl2-client)
   1: fact: svs-alto depends on ucsmsdk (^0.9.10)
   1: fact: svs-alto depends on ansible (^2.10.1)
   1: fact: svs-alto depends on black (^19.10b0)
   1: fact: svs-alto depends on pytest (^6.0.1)
   1: fact: svs-alto depends on black (^19.10b0)
   1: fact: svs-alto depends on pytest (^6.0.1)
   1: selecting svs-alto (0.1.0)
   1: derived: pytest (^6.0.1)
   1: derived: black (^19.10b0)
   1: derived: ansible (^2.10.1)
   1: derived: ucsmsdk (^0.9.10)
   1: derived: virl2_client (2.1.0-rc.1 lib/virl2-client)
   1: derived: jinja2 (^2.11.2)
   1: derived: xlrd (^1.2.0)
   1: derived: json2yaml (^1.1.1)
   1: derived: pyyaml (^5.3.1)
   1: derived: yaml-1.3 (^0.1.0)
   1: derived: openpyxl (^3.0.4)
   1: derived: pandas (^1.1.0)
   1: derived: jupyter (^1.0.0)
   1: derived: python-xml2dict (^0.1.1)
   1: fact: pytest (6.1.1) depends on attrs (>=17.4.0)
   1: fact: pytest (6.1.1) depends on iniconfig (*)
   1: fact: pytest (6.1.1) depends on packaging (*)
   1: fact: pytest (6.1.1) depends on pluggy (>=0.12,<1.0)
   1: fact: pytest (6.1.1) depends on py (>=1.8.2)
   1: fact: pytest (6.1.1) depends on toml (*)
   1: fact: pytest (6.1.1) depends on importlib-metadata (>=0.12)
   1: fact: pytest (6.1.1) depends on atomicwrites (>=1.0)
   1: fact: pytest (6.1.1) depends on colorama (*)
   1: selecting pytest (6.1.1)
   1: derived: colorama (*)
   1: derived: atomicwrites (>=1.0)
   1: derived: importlib-metadata (>=0.12)
   1: derived: toml (*)
   1: derived: py (>=1.8.2)
   1: derived: pluggy (>=0.12,<1.0)
   1: derived: packaging (*)
   1: derived: iniconfig (*)
   1: derived: attrs (>=17.4.0)
   1: fact: black (19.10b0) depends on click (>=6.5)
   1: fact: black (19.10b0) depends on attrs (>=18.1.0)
   1: fact: black (19.10b0) depends on appdirs (*)
   1: fact: black (19.10b0) depends on toml (>=0.9.4)
   1: fact: black (19.10b0) depends on typed-ast (>=1.4.0)
   1: fact: black (19.10b0) depends on regex (*)
   1: fact: black (19.10b0) depends on pathspec (>=0.6,<1)
   1: selecting black (19.10b0)
   1: derived: pathspec (>=0.6,<1)
   1: derived: regex (*)
   1: derived: typed-ast (>=1.4.0)
   1: derived: toml (>=0.9.4)
   1: derived: appdirs (*)
   1: derived: attrs (>=18.1.0)
   1: derived: click (>=6.5)
PyPI: No release information found for ansible-1.9.0, skipping
PyPI: No release information found for ansible-2.0.0, skipping
PyPI: 1 packages found for ansible >=2.10.1,<3.0.0
   1: fact: ansible (2.10.1) depends on ansible-base (>=2.10.2,<2.11)
   1: selecting ansible (2.10.1)
   1: derived: ansible-base (>=2.10.2,<2.11)
PyPI: 1 packages found for ansible-base >=2.10.2,<2.11
   1: fact: ucsmsdk (0.9.10) depends on pyparsing (*)
   1: fact: ucsmsdk (0.9.10) depends on six (*)
   1: selecting ucsmsdk (0.9.10)
   1: derived: six (*)
   1: derived: pyparsing (*)
   1: fact: virl2-client (2.1.0-rc.1 /Users/jkary/src/python/svs-alto/lib/virl2-client) depends on requests (^2)
   1: selecting virl2-client (2.1.0-rc.1 /Users/jkary/src/python/svs-alto/lib/virl2-client)
   1: derived: requests (^2)
   1: fact: jinja2 (2.11.2) depends on MarkupSafe (>=0.23)
   1: selecting jinja2 (2.11.2)
   1: derived: MarkupSafe (>=0.23)
   1: selecting xlrd (1.2.0)
   1: fact: json2yaml (1.1.1) depends on pyyaml (*)
   1: fact: json2yaml (1.1.1) depends on pyaml (*)
   1: fact: json2yaml (1.1.1) depends on docopt (*)
   1: selecting json2yaml (1.1.1)
   1: derived: docopt (*)
   1: derived: pyaml (*)
   1: selecting pyyaml (5.3.1)
   1: fact: yaml-1.3 (0.1.0) depends on ruamel.appconfig (*)
   1: fact: yaml-1.3 (0.1.0) depends on ruamel.std.argparse (>=0.8)
   1: selecting yaml-1.3 (0.1.0)
   1: derived: ruamel.std.argparse (>=0.8)
   1: derived: ruamel.appconfig (*)
   1: fact: openpyxl (3.0.5) depends on jdcal (*)
   1: fact: openpyxl (3.0.5) depends on et-xmlfile (*)
   1: selecting openpyxl (3.0.5)
   1: derived: et-xmlfile (*)
   1: derived: jdcal (*)
   1: fact: pandas (1.1.3) depends on python-dateutil (>=2.7.3)
   1: fact: pandas (1.1.3) depends on pytz (>=2017.2)
   1: fact: pandas (1.1.3) depends on numpy (>=1.15.4)
   1: selecting pandas (1.1.3)
   1: derived: numpy (>=1.15.4)
   1: derived: pytz (>=2017.2)
   1: derived: python-dateutil (>=2.7.3)
   1: fact: jupyter (1.0.0) depends on notebook (*)
   1: fact: jupyter (1.0.0) depends on qtconsole (*)
   1: fact: jupyter (1.0.0) depends on jupyter-console (*)
   1: fact: jupyter (1.0.0) depends on nbconvert (*)
   1: fact: jupyter (1.0.0) depends on ipykernel (*)
   1: fact: jupyter (1.0.0) depends on ipywidgets (*)
   1: selecting jupyter (1.0.0)
   1: derived: ipywidgets (*)
   1: derived: ipykernel (*)
   1: derived: nbconvert (*)
   1: derived: jupyter-console (*)
   1: derived: qtconsole (*)
   1: derived: notebook (*)
   1: selecting python-xml2dict (0.1.1)
   1: selecting colorama (0.4.4)
   1: selecting atomicwrites (1.4.0)
   1: fact: importlib-metadata (2.0.0) depends on zipp (>=0.5)
   1: selecting importlib-metadata (2.0.0)
   1: derived: zipp (>=0.5)
   1: selecting toml (0.10.1)
   1: selecting py (1.9.0)
   1: fact: pluggy (0.13.1) depends on importlib-metadata (>=0.12)
   1: selecting pluggy (0.13.1)
   1: fact: packaging (20.4) depends on pyparsing (>=2.0.2)
   1: fact: packaging (20.4) depends on six (*)
   1: selecting packaging (20.4)
   1: derived: pyparsing (>=2.0.2)
   1: selecting iniconfig (1.1.1)
   1: selecting attrs (20.2.0)
   1: selecting pathspec (0.8.0)
   1: selecting regex (2020.10.15)
   1: selecting typed-ast (1.4.1)
   1: selecting appdirs (1.4.4)
   1: selecting click (7.1.2)
PyPI: Getting info for ansible-base (2.10.2) from PyPI
PyPI: No dependencies found, downloading archives
PyPI: Downloading sdist: ansible-base-2.10.2.tar.gz
   1: Version solving took 5.247 seconds.
   1: Tried 1 solutions.

  Stack trace:

  26  ~/.poetry/lib/poetry/_vendor/py3.7/clikit/console_application.py:131 in run
       129│             parsed_args = resolved_command.args
       130│
     → 131│             status_code = command.handle(parsed_args, io)
       132│         except KeyboardInterrupt:
       133│             status_code = 1

  25  ~/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py:120 in handle
       118│     def handle(self, args, io):  # type: (Args, IO) -> int
       119│         try:
     → 120│             status_code = self._do_handle(args, io)
       121│         except KeyboardInterrupt:
       122│             if io.is_debug():

  24  ~/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py:171 in _do_handle
       169│         handler_method = self._config.handler_method
       170│
     → 171│         return getattr(handler, handler_method)(args, io, self)
       172│
       173│     def __repr__(self):  # type: () -> str

  23  ~/.poetry/lib/poetry/_vendor/py3.7/cleo/commands/command.py:92 in wrap_handle
        90│         self._command = command
        91│
     →  92│         return self.handle()
        93│
        94│     def handle(self):  # type: () -> Optional[int]

  22  ~/.poetry/lib/poetry/console/commands/add.py:174 in handle
       172│
       173│         try:
     → 174│             status = self._installer.run()
       175│         except Exception:
       176│             self.poetry.file.write(original_content)

  21  ~/.poetry/lib/poetry/installation/installer.py:103 in run
       101│         local_repo = Repository()
       102│
     → 103│         return self._do_install(local_repo)
       104│
       105│     def dry_run(self, dry_run=True):  # type: (bool) -> Installer

  20  ~/.poetry/lib/poetry/installation/installer.py:235 in _do_install
       233│             )
       234│
     → 235│             ops = solver.solve(use_latest=self._whitelist)
       236│         else:
       237│             self._io.write_line("Installing dependencies from lock file")

  19  ~/.poetry/lib/poetry/puzzle/solver.py:65 in solve
        63│         with self._provider.progress():
        64│             start = time.time()
     →  65│             packages, depths = self._solve(use_latest=use_latest)
        66│             end = time.time()
        67│

  18  ~/.poetry/lib/poetry/puzzle/solver.py:234 in _solve
       232│         try:
       233│             result = resolve_version(
     → 234│                 self._package, self._provider, locked=locked, use_latest=use_latest
       235│             )
       236│

  17  ~/.poetry/lib/poetry/mixology/__init__.py:7 in resolve_version
       5│     solver = VersionSolver(root, provider, locked=locked, use_latest=use_latest)
       6│
     → 7│     return solver.solve()
       8│

  16  ~/.poetry/lib/poetry/mixology/version_solver.py:84 in solve
        82│             while next is not None:
        83│                 self._propagate(next)
     →  84│                 next = self._choose_package_version()
        85│
        86│             return self._result()

  15  ~/.poetry/lib/poetry/mixology/version_solver.py:397 in _choose_package_version
       395│             version = locked
       396│
     → 397│         version = self._provider.complete_package(version)
       398│
       399│         conflict = False

  14  ~/.poetry/lib/poetry/puzzle/provider.py:436 in complete_package
       434│                     package.version.text,
       435│                     extras=list(package.dependency.extras),
     → 436│                     repository=package.dependency.source_name,
       437│                 ),
       438│             )

  13  ~/.poetry/lib/poetry/repositories/pool.py:135 in package
       133│             for idx, repo in enumerate(self._repositories):
       134│                 try:
     → 135│                     package = repo.package(name, version, extras=extras)
       136│                 except PackageNotFound:
       137│                     continue

  12  ~/.poetry/lib/poetry/repositories/pypi_repository.py:162 in package
       160│         extras=None,  # type: (Union[list, None])
       161│     ):  # type: (...) -> Package
     → 162│         return self.get_release_info(name, version).to_package(name=name, extras=extras)
       163│
       164│     def search(self, query):

  11  ~/.poetry/lib/poetry/repositories/pypi_repository.py:228 in get_release_info
       226│
       227│         cached = self._cache.remember_forever(
     → 228│             "{}:{}".format(name, version), lambda: self._get_release_info(name, version)
       229│         )
       230│

  10  ~/.poetry/lib/poetry/_vendor/py3.7/cachy/repository.py:174 in remember_forever
       172│             return val
       173│
     → 174│         val = value(callback)
       175│
       176│         self.forever(key, val)

   9  ~/.poetry/lib/poetry/_vendor/py3.7/cachy/helpers.py:6 in value
       4│ def value(val):
       5│     if callable(val):
     → 6│         return val()
       7│
       8│     return val

   8  ~/.poetry/lib/poetry/repositories/pypi_repository.py:228 in <lambda>
       226│
       227│         cached = self._cache.remember_forever(
     → 228│             "{}:{}".format(name, version), lambda: self._get_release_info(name, version)
       229│         )
       230│

   7  ~/.poetry/lib/poetry/repositories/pypi_repository.py:308 in _get_release_info
       306│                 return data.asdict()
       307│
     → 308│             info = self._get_info_from_urls(urls)
       309│
       310│             data.requires_dist = info.requires_dist

   6  ~/.poetry/lib/poetry/repositories/pypi_repository.py:423 in _get_info_from_urls
       421│                 return self._get_info_from_wheel(platform_specific_wheels[0])
       422│
     → 423│         return self._get_info_from_sdist(urls["sdist"][0])
       424│
       425│     def _get_info_from_wheel(self, url):  # type: (str) -> PackageInfo

   5  ~/.poetry/lib/poetry/repositories/pypi_repository.py:451 in _get_info_from_sdist
       449│             self._download(url, str(filepath))
       450│
     → 451│             return PackageInfo.from_sdist(filepath)
       452│
       453│     def _download(self, url, dest):  # type: (str, str) -> None

   4  ~/.poetry/lib/poetry/inspection/info.py:561 in from_sdist
       559│         """
       560│         if path.is_file():
     → 561│             return cls._from_sdist_file(path=path)
       562│
       563│         # if we get here then it is neither an sdist instance nor a file

   3  ~/.poetry/lib/poetry/inspection/info.py:291 in _from_sdist_file
       289│
       290│             # now this is an unpacked directory we know how to deal with
     → 291│             new_info = cls.from_directory(path=sdist_dir)
       292│
       293│         if not info:

   2  ~/.poetry/lib/poetry/inspection/info.py:541 in from_directory
       539│                         info = cls.from_setup_files(path)
       540│                     else:
     → 541│                         info = cls._pep517_metadata(path)
       542│                 except PackageInfoError:
       543│                     if not info:

   1  ~/.poetry/lib/poetry/inspection/info.py:506 in _pep517_metadata
       504│                     )
       505│                 finally:
     → 506│                     os.chdir(cwd.as_posix())
       507│
       508│         if info:

  RuntimeError

  generator didn't stop after throw()

  at ~/.pyenv/versions/3.7.2/lib/python3.7/contextlib.py:161 in __exit__
      157│                 # by 'except BaseException'.
      158│                 if sys.exc_info()[1] is value:
      159│                     return False
      160│                 raise
    → 161│             raise RuntimeError("generator didn't stop after throw()")
      162│
      163│
      164│ class _AsyncGeneratorContextManager(_GeneratorContextManagerBase,
      165│                                     AbstractAsyncContextManager):
JKARY-M-V80G:svs-alto jkary$