• 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: Mac OS Mojave (10.14.6)

• Poetry version: 1.0.0b5

• Link of a Gist with the contents of your pyproject.toml file: https://gist.github.com/orokusaki/0750bd0dfef13324353d302d74a48254

Further environment notes

• Python 2.7.17 and Python 3.7.5 installed via Homebrew
• Poetry installed via curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | POETRY_PREVIEW=1 python

Issue

Upon using poetry shell -vvv (also tried without -vvv flag) the shell appears to spawn, but when I attempt to type any command, no text appears in the Terminal, and when I hit return I get what you can see in the screenshot I attached (the screenshot reflects the state after I typed a few characters and then hit return twice). If I send SIGINT to the shell (CTRL + C), the Terminal drops to a new line with the same output and lack of responsiveness, and upon sending SIGINT many times I'm still left with the Terminal in an unusable state. If I attempt to close Terminal, I get "Closing this tab will terminate the running processes: bash, Python.", which indicates that some code in Poetry is still hung up.

Screenshot