Dropping barriers to open up opportunities for contribution is a critical activity for Eclipse open source projects.
Ideally, Eclipse open source project teams should be actively soliciting contribution, growing participation in the project, and otherwise being good open source citizens. Minimally, though, Eclipse project teams must engage in practices that make is so that when potential contributors do find the project, they have a fighting chance of being successful.
Making it so that people who are outside of the development team (that is, the committers) have the ability to access the most up-to-date version of the project code is an absolute requirement.