prevent crash during timer expiration after stream is closed

Reorder ticker stop and close merge to prevent send(true) happens after merge is closed, in rare situation when the timer expires exactly at the point between close(merge) and ticker.Stop()

Signed-off-by: morapet <[email protected]>

server/application/logs.go

@@ -144,8 +144,8 @@ func mergeLogStreams(streams []chan logEntry, bufferingDuration time.Duration) c
 
 		_ = send(true)
 
-		close(merged)
 		ticker.Stop()
+		close(merged)
 	}()
 	return merged
 }