github.com/neugram/ng@v0.0.0-20180309130942-d472ff93d872/eval/testdata/select2_error.ng (about)

     1  ch1 := make(chan int)
     2  ch2 := make(chan int)
     3  ok := true
     4  select {
     5  case ch1 <- 42:
     6  case v := ok: // ERROR: select case must be receive send or assign recv
     7  case v := <-ch1:
     8  case v, ok := <-ch2:
     9  }