pipenv ate my while loop

We have various Lambda functions in our CDK project that each have a handler.py file that is executed on AWS Lambda.

To automate unit testing on our CI/CD process, we use find to automatically iterate over each of our Lambda functions and install their specific dependencies using pipenv and then run pytest withnin that environmment.

As of this weekend, our build process is failing because pipenv 2022.12.17 is eating our while loop and preventing all of our Lambda functions from being installed and tested.

Reproducing the issue

Working command

docker build --build-arg VERSION=2022.11.30 -t foo:latest .

Failing command

docker build --build-arg VERSION=2022.12.17 -t foo:latest .

To debug:

• Comment out RUN ls -lah lambdas/lambda-1/build/ && ls -lah lambdas/lambda-2/build/ in Dockerfile
• Run docker build --build-arg VERSION=2022.12.17 -t foo:latest . && docker run -it foo:latest /bin/bash

The diff of pipenv v2022.11.30 to v2022.12.17 can be found at https://github.com/pypa/pipenv/compare/v2022.11.30...v2022.12.17

Hints

• It doesn't look like pipenv is raising an exit code that is stopping our script.
• The script below appears to work, so perhaps the while read is specifically problematic?

#!/bin/bash

# Die on any errors
set -e

declare -a StringArray=("lambda-1" "lambda-2")
for lambda in ${StringArray[@]}; do
    echo "Processing $lambda"
    cd lambdas/$lambda

    pipenv install -e .

    echo "Completed processing $lambda"
    cd -

    echo "Completed while loop for $lambda"
done