From f0b1196365b299d09aaa651bfe22367ad4cf8f88 Mon Sep 17 00:00:00 2001
From: William Apollo <4895865+Spaceenter@users.noreply.github.com>
Date: Fri, 16 Jun 2023 16:34:21 -0700
Subject: [PATCH] Fix a bug for tokenize for place recognize. (#1165)

---
 internal/server/recon/recognize.go      | 3 +++
 internal/server/recon/recognize_test.go | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/internal/server/recon/recognize.go b/internal/server/recon/recognize.go
index 385494fa7..02944efb3 100644
--- a/internal/server/recon/recognize.go
+++ b/internal/server/recon/recognize.go
@@ -76,6 +76,9 @@ func tokenize(query string) []string {
 		if string(partBySpace[0]) == "," {
 			tokens = append(tokens, ",")
 			partBySpace = partBySpace[1:]
+			if partBySpace == "" {
+				continue
+			}
 		}
 
 		// Check suffix.
diff --git a/internal/server/recon/recognize_test.go b/internal/server/recon/recognize_test.go
index 9301d2a2b..27b127177 100644
--- a/internal/server/recon/recognize_test.go
+++ b/internal/server/recon/recognize_test.go
@@ -67,6 +67,10 @@ func TestTokenize(t *testing.T) {
 			" alpha  ,beta,Gamma,  delta eta",
 			[]string{"alpha", ",", "beta", ",", "Gamma", ",", "delta", "eta"},
 		},
+		{
+			"alpha , beta,Gamma",
+			[]string{"alpha", ",", "beta", ",", "Gamma"},
+		},
 	} {
 		got := tokenize(c.query)
 		if diff := cmp.Diff(got, c.want); diff != "" {