There is a common pattern of "synchronization":

var result ...
go func() {
  ...
  result = ...
}()
time.Sleep(time.Second)  // 1 second should be enough for everyone
if bad(result) {
  complain()
}

C++ ThreadSanitizer prints a useful "As if synchronized via sleep" message
with a stack trace of the sleep:
http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/tsan/lit_tests/sleep_sync.cc?view=markup

It would be useful to do the same for Go.