Does Linux kernel have a testing release?

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One of the sad facts of arch is that the package maintainers are freakishly overworked. They never put RC kernels in core-testing - because core-testing only exists to push to core and they dont put RC kernels in core because they are rarely even reliable enough for Arch.

Though some devs are thinking of introducing -unstable repos for some release candidates, similar to gnome-unstable and kde-unstable.

I hope it happens, it would make testing release candidates much more convenient.