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I'm worried we have a problem at dhtnode.go:126, but I'm not sure...

From the course notes:

"
Beware: this code is not correct:

var x int
done := false
go func() { x = f(...); done = true }
while done == false { }

it's very tempting to write, but Go spec says it's undefined
use a channel or sync.WaitGroup instead
"