diff --git a/build.sh b/build.sh
index 4ccdc87..7fad1f3 100755
--- a/build.sh
+++ b/build.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-VERSION="1.2.0"
+VERSION="1.2.1"
 PROTECTED_MODE="no"
 
 export GO15VENDOREXPERIMENT=1
diff --git a/cmd/triangle/main.go b/cmd/triangle/main.go
index e11b9fa..e8daa37 100644
--- a/cmd/triangle/main.go
+++ b/cmd/triangle/main.go
@@ -176,6 +176,7 @@ func main() {
 			}()
 		}
 
+		// close the channel after the values flowing through the channel are consumed.
 		go func() {
 			defer close(ch)
 			wg.Wait()