Redmine

If no issue priority is defined, creating an issue using issue#create fails with the following error:

NoMethodError (undefined method `id' for nil:NilClass):

app/models/issue.rb:2075:in `clear_disabled_fields'
app/controllers/issues_controller.rb:153:in `create'
lib/redmine/sudo_mode.rb:78:in `sudo_mode'

This can be fixed with the attached patch which results in a proper error message to be shown to the user:

Priority cannot be blank

Unfortunately, this message is still shown even if the priority field is disabled for a tracker (as we still have to set a priority here, see #38416).

This may be acceptable as a uncommon special case though. If this shall be changed, we might handle this similar to the check for a defined tracker and default status in IssueController#build_new_issue_from_params.