From e6d963562f187cd73d1606ee378e38726ae4c8be Mon Sep 17 00:00:00 2001
From: Andrew Baldwin <andrew.baldwin44@gmail.com>
Date: Mon, 26 Aug 2024 10:17:42 -0400
Subject: [PATCH] Safeguard charts.time

---
 locust/webui/src/components/LineChart/LineChart.utils.ts | 2 +-
 locust/webui/src/redux/slice/ui.slice.ts                 | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/locust/webui/src/components/LineChart/LineChart.utils.ts b/locust/webui/src/components/LineChart/LineChart.utils.ts
index 5a7741c3ae..f63a6a77ba 100644
--- a/locust/webui/src/components/LineChart/LineChart.utils.ts
+++ b/locust/webui/src/components/LineChart/LineChart.utils.ts
@@ -125,7 +125,7 @@ export const createOptions = <ChartType extends Pick<ICharts, 'time'>>({
   },
   xAxis: {
     type: 'time',
-    startValue: charts.time[0],
+    startValue: (charts.time || [''])[0],
     axisLabel: {
       formatter: formatTimeAxis,
     },
diff --git a/locust/webui/src/redux/slice/ui.slice.ts b/locust/webui/src/redux/slice/ui.slice.ts
index c85c1d60f6..9dc592514d 100644
--- a/locust/webui/src/redux/slice/ui.slice.ts
+++ b/locust/webui/src/redux/slice/ui.slice.ts
@@ -76,7 +76,7 @@ const uiSlice = createSlice({
           ...addSpaceToChartsBetweenTests(state.charts as ICharts),
           markers: (state.charts as ICharts).markers
             ? [...((state.charts as ICharts).markers as string[]), payload]
-            : [state.charts.time[0], payload],
+            : [(state.charts.time || [''])[0], payload],
         },
       };
     },