A failing test for incorrect is-mainline setting in mainline development.

[da9l]

PR with failing test for issue #1671 There are two new tests.

• A non-failing test that set a correct configuration for mainline development (master is-mainline=true)
• A failing test that set an incorrect configuration for mainline development (master is-mainline=false& release is-mainline=true)

Expected behavior: If not supported, this should give a relevant error message instead of an exception.

Disclaimer: This failing test might not cover all cases when this might happen.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. After 30 days from now, it will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. After 30 days from now, it will be closed if no further activity occurs. Thank you for your contributions.