Seeing an no output hang at the first step run by a docker agent when there is an environment variable with a value that ends with a double quote.

Like when the github PR being built has a double quote at the end of it's title.

https://github.com/jenkinsci/docker-workflow-plugin/pull/220 did fix the issue for double quotes in other positions.

In my case, where only github PR titles were an issue, the following is a workaround.

env.CHANGE_TITLE = env.CHANGE_TITLE.replaceAll('"','\'')

That prevented the hang that had occurred when the PR title (env.CHANGE_ENV) was

Checking if "quotes" are correctly ("escaped") "even with trailing ones"

Note the hang did not occur when PR title (env.CHANGE_ENV) was:

Checking if "quotes" are correctly ("escaped")