Adds checking of template error

go/src/infra/tricium/service/workflow-listener/handlers.go

Index: go/src/infra/tricium/service/workflow-listener/handlers.go
diff --git a/go/src/infra/tricium/service/workflow-listener/handlers.go b/go/src/infra/tricium/service/workflow-listener/handlers.go
index cd676c917b838c147b11477125be0c36a52ddb65..923d7e0477559ea06bc399c989af8d7b885a7db2 100644
--- a/go/src/infra/tricium/service/workflow-listener/handlers.go
+++ b/go/src/infra/tricium/service/workflow-listener/handlers.go
@@ -25,7 +25,10 @@ func statusPageHandler(w http.ResponseWriter, r *http.Request) {
 	data := map[string]interface{}{
 		"Msg": "Status of the Workflow Listener ...",
 	}
-	basePage.Execute(w, data)
+	if e := basePage.Execute(w, data); e != nil {
+		http.Error(w, e.Error(), http.StatusInternalServerError)
+		return
+	}
 }
 
 func queueHandler(w http.ResponseWriter, r *http.Request) {
@@ -35,8 +38,8 @@ func queueHandler(w http.ResponseWriter, r *http.Request) {
 
 	// Enqueue gerrit reporter task.
 	t := taskqueue.NewPOSTTask("/gerrit-reporter/queue-handler", map[string][]string{"name": {"Workflow Event"}})
-	if _, err := taskqueue.Add(ctx, t, "gerrit-reporter-queue"); err != nil {
-		http.Error(w, err.Error(), http.StatusInternalServerError)
+	if _, e := taskqueue.Add(ctx, t, "gerrit-reporter-queue"); e != nil {
+		http.Error(w, e.Error(), http.StatusInternalServerError)
 		return
 	}
 }