The `poetry install` command does not modify the file `env.toml`

Description

Steps to reproduce:

1. Create a poetry project.
2. Install two python versions: for example, python 3.12.2 and 3.12.3.
3. poetry env use /<path to python 3.12.2>/bin/python.
4. Delete existing env rm -rf $(poetry env info --path).
5. Create a new one with poetry install (Poetry will use the newest patch version by default 3.12.3).
6. Run command poetry env use /.../pypoetry/virtualenvs/poetry-project-name/bin/python

Poetry deletes the existing poetry environment with an error: Could not find the python executable /.../pypoetry/virtualenvs/poetry-project-name/bin/python

Workarounds

Manually change the version of the interpreter in the file env.toml.

In my example from 3.12.2 to 3.12.3.

Poetry Installation Method

system package manager (eg: dnf, apt etc.)

Operating System

MacOS Sonoma 14.3.1

Poetry Version

1.7.1

Poetry Configuration

cache-dir = "/Users/Egor.Eliseev/Library/Caches/pypoetry"
experimental.system-git-client = false
installer.max-workers = null
installer.modern-installation = true
installer.no-binary = null
installer.parallel = true
virtualenvs.create = true
virtualenvs.in-project = null
virtualenvs.options.always-copy = false
virtualenvs.options.no-pip = false
virtualenvs.options.no-setuptools = false
virtualenvs.options.system-site-packages = false
virtualenvs.path = "{cache-dir}/virtualenvs"  # /Users/Egor.Eliseev/Library/Caches/pypoetry/virtualenvs
virtualenvs.prefer-active-python = false
virtualenvs.prompt = "{project_name}-py{python_version}"
warnings.export = true

Python Sysconfig

No response

Example pyproject.toml

[tool.poetry]
name = "poetry-pro"
version = "0.1.0"
description = ""
authors = ["Some Dev <somedev@mail.com>"]
packages = []

[tool.poetry.dependencies]
python = "^3.12"

[build-system]
requires = ["poetry-core"]
build-backend = "poetry.core.masonry.api"

Poetry Runtime Logs

Stack trace:

  8  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/application.py:327 in run
      325│ 
      326│             try:
    → 327│                 exit_code = self._run(io)
      328│             except BrokenPipeError:
      329│                 # If we are piped to another process, it may close early and send a

  7  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/poetry/console/application.py:190 in _run
      188│         self._load_plugins(io)
      189│ 
    → 190│         exit_code: int = super()._run(io)
      191│         return exit_code
      192│ 

  6  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/application.py:431 in _run
      429│             io.input.interactive(interactive)
      430│ 
    → 431│         exit_code = self._run_command(command, io)
      432│         self._running_command = None
      433│ 

  5  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/application.py:473 in _run_command
      471│ 
      472│         if error is not None:
    → 473│             raise error
      474│ 
      475│         return terminate_event.exit_code

  4  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/application.py:457 in _run_command
      455│ 
      456│             if command_event.command_should_run():
    → 457│                 exit_code = command.run(io)
      458│             else:
      459│                 exit_code = ConsoleCommandEvent.RETURN_CODE_DISABLED

  3  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/commands/base_command.py:117 in run
      115│         io.input.validate()
      116│ 
    → 117│         return self.execute(io) or 0
      118│ 
      119│     def merge_application_definition(self, merge_args: bool = True) -> None:

  2  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/cleo/commands/command.py:61 in execute
       59│ 
       60│         try:
    →  61│             return self.handle()
       62│         except KeyboardInterrupt:
       63│             return 1

  1  /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/poetry/console/commands/env/use.py:24 in handle
       22│             return 0
       23│ 
    →  24│         env = manager.activate(self.argument("python"))
       25│ 
       26│         self.line(f"Using virtualenv: {env.path}")

  PythonVersionNotFound

  Could not find the python executable /.../pypoetry/virtualenvs/poetry-project-name-py3.12/bin/python

  at /opt/homebrew/Cellar/poetry/1.7.1/libexec/lib/python3.12/site-packages/poetry/utils/env/env_manager.py:141 in activate
      137│             pass
      138│ 
      139│         python_path = self._full_python_path(python)
      140│         if python_path is None:
    → 141│             raise PythonVersionNotFound(python)
      142│ 
      143│         try:
      144│             python_version_string = subprocess.check_output(
      145│                 [python_path, "-c", GET_PYTHON_VERSION_ONELINER], text=True

Start with poetry/console/commands/env/use.py and poetry/utils/env/env_manager.py, especially the activation path around line 141, then reproduce the listed Python-version switch sequence. Trace how poetry install records the selected interpreter in env.toml. Done means the recorded interpreter matches the newly created environment and the subsequent poetry env use command no longer rejects its executable.