• 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: Ubuntu 16.04
• Poetry version: 1.1.2
• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/marns93/45bdf3adce4b457a35dc481b55fc219d

Issue

Regarding to the PR #3089 the dependencies are not exported correctly.
The exception does not occur anymore, but the git url of the nested git dependency is missing in the requirements.txt.

$ poetry export -f requirements.txt --without-hashes
flake8==3.8.4
mccabe==0.6.1
peppercorn==0.6
pycodestyle==2.6.0
pyflakes==2.2.0
sampleproject-mm @ git+ssh://[email protected]/moneymeets/sampleproject.git@83068b995c2f94b0d51333b932b1a939084e9ef7
sampleproject==2.0.0

The output of the export command in the sampleproject repository is as expected.

poetry export -f requirements.txt --without-hashes
flake8==3.8.4
mccabe==0.6.1
peppercorn==0.6
pycodestyle==2.6.0
pyflakes==2.2.0
sampleproject @ git+ssh://[email protected]/pypa/sampleproject.git@52966defd6a61e97295b0bb82cd3474ac3e11c7a

You can reproduce this issue with the linked pyproject.toml.