> Only lightly tested.
In a sense, plan9/arm go is tested as well as any other platform:
under the go continuous development process, every time a change
is made to the compiler or runtime library, a complete test suite
is run on builder machines for every supported architecture and
operating system. If you look at https://build.golang.org and
scroll wayyyyyyyy over to the right, the plan9/arm column refers
to a set of Raspberry Pi machines run by David du Columbier and me.
In another sense, it's probably not very well tested at all:
I'm not aware of any production application being run on go in
Plan 9, on any machine architecture. I haven't used go seriously
myself, but I find the test suite gives the OS such a brutal workout
(especially with small physical memory) that it's a good way
to flush out underlying Plan 9 bugs.
The tests show some intermittent hard-to-reproduce failures ("flakes")
on all the Plan 9 builders. Many are timing issues because the tests
make assumptions about absolute speed of builder machines; but there
are some "can't happen" panics during garbage collection which smell
like a cache or memory barrier problem. Please don't use plan9/arm
go to run your nuclear power plant just yet ...
