"poetry install" fails if corrupted package installed

[Conchylicultor]

• 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: MacOS

• Poetry version: 1.2.0a

Issue

I have a dummy poetry file:

[tool.poetry]
name = "my_project"
version = "0.1.0"
description = "Poetry plugin to setup automated release"
authors = ["Sunds team <sunds@google.com>"]

[tool.poetry.dependencies]
python = "^3.7"

I'm trying to install this file globally (as this is a poetry plugin)

poetry config virtualenvs.create false
poetry install

However this fail with:

/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/poetry/core/version/pep440/parser.py:67

 InvalidVersion

  Invalid PEP 440 version: '3.2.1-nightly'

Full stacktrace: https://gist.github.com/Conchylicultor/d868433147613a1e9cd89d0d15f6b107

I'm quite confused by this error. I'm prevented of installing my project even though my configuration file is perfectly valid.

The error is also very much not explicit. I had to manually modify the poetry source code to find out which package was responsible for this error. (It was some package installed with pip install -e).

Somehow I think poetry try to parse the package installed on my system. I checked with pip freeze that no package has 3.2.1 version (https://gist.github.com/Conchylicultor/a0922af93f734de3368208f9044536ee).

Looking at other github issue (#4176), it seems that I'm not the first to have similar issue. Like pip, poetry should ignore non-standard packages, rather than failing. Or at minima raise more explicit error messages.

[finswimmer]

Hello @Conchylicultor,

this is duplicate of #4022

fin swimmer

[github-actions]

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