• Poetry version: 1.3.1
• Python version: 3.10.8
• OS version and name: macOS 12.6
• pyproject.toml:

[tool.poetry]
name = "poetry-test"
version = "0.1.0"
description = ""
authors = []

[tool.poetry.dependencies]
python = "^3.10, <3.11"
typer = "*"

[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

• I am on the latest stable Poetry version, installed using a recommended method.
• I have searched the issues of this repo and believe that this is not a duplicate.
• I have consulted the FAQ and blog for any relevant entries or release notes.
• If an exception occurs when executing a command, I executed it again in debug mode (-vvv option) and have included the output below.

Issue

Running the following command for the simple project above does not generate an error:

$ poetry install --only batman

The real world case for this was in a real production application Dockerfile we misspelled a group name by a single character, and it was not obvious why some of the dependencies were not being installed and took several hours to debug.

I would recommend that poetry install --without, --with, --only should all validate that the group names passed them actually exist and error if not, printing an error that shows which group name was not valid.