<!-- Hi there! Thank you for discovering and submitting an issue. Before you submit this; let's make sure of a few things. Please make sure the following boxes are ticked if they are correct. If not, please try and fulfill these first. --> <!-- Checked checkbox should look like this: [x] --> - [x] I am on the [latest](https://github.com/python-poetry/poetry/releases/latest) Poetry version. - [x] I have searched the [issues](https://github.com/python-poetry/poetry/issues) of this repo and believe that this is not a duplicate. - [x] If an exception occurs when executing a command, I executed it again in debug mode (`-vvv` option). <!-- Once those are done, if you're able to fill in the following list with your information, it'd be very helpful to whoever handles the issue. --> - **OS version and name**: macOS 11.2.2 - **Poetry version**: 1.1.4 - **Link of a [Gist](https://gist.github.com/) with the contents of your pyproject.toml file**: https://gist.github.com/beaugunderson/cfb9a818ba42d63a1d14de7dc33a99aa ## Issue Executing `poetry lock --no-update` (with no changes to `pyproject.toml`) updates the versions of a dependency in our `poetry.lock`:  Additionally, when executing the same command with `-vvv` I get an exception in the debugging code: 
-vvvoption).Issue
Executing
poetry lock --no-update(with no changes topyproject.toml) updates the versions of a dependency in ourpoetry.lock:Additionally, when executing the same command with
-vvvI get an exception in the debugging code: