Required dependency missing from lockfile

[levrik]

• 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 12.5.1
• Poetry version: 1.2.0
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/levrik/a4b55e147eafc9817cf82c5a92b801fd

Issue

Adding the package ariadne to an empty project via poetry add ariadne results in a lockfile being generated with the starlette dependency missing from it.
We discovered it by upgrading an existing project to Poetry 1.2.0 and re-installing ariadne. It resulted in the following diff:

The package clearly defines starlette as an required dependency, as can be seen here: https://github.com/mirumee/ariadne/blob/0.15.1/setup.py#L36

The METADATA file in the downloaded Wheel also contains this line: Requires-Dist: starlette (>0.17<0.20)

[levrik]

I just realized that the version range defined by ariadne is just wrong, missing a comma between >0.17 and <0.20 ?

[levrik]

Okay. Seems to have been fixed already on their side: mirumee/ariadne#877

So no bug on Poetry's side. Still it would be great if Poetry could maybe output a warning during installation instead of silently ignoring the dependency?

[dimbleby]

There's a debug log for this, I expect that an MR making this a warning would be welcome

poetry/src/poetry/inspection/info.py

Lines 208 to 211 in 28d0175

	logger.debug(
	f"Invalid constraint ({req}) found in"
	f" {package.name}-{package.version} dependencies, skipping",
	)

[levrik]

@dimbleby Thanks for pointing this out. I'll try to create a PR when I have time.

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