`test:first job: script should be a string or an array of a strings`

Question

I'd like to create a simple "hello, world" Gitlab CI script. I already got the Docker runner working and I'm experimenting with something like this:

image: debian:sid

test:first:
  script:
  - true

Unfortunately, the build fails with the error: test:first job: script should be a string or an array of a strings

What am I doing wrong?

Answer 1

After a bit of experimenting, I found the root cause and reported it as a bug. Apparently "true" was evaluated as a boolean here. Adding path to true executable helped solve the problem.