From d05b47ec0d0ef403233b23874ec0c705b3dc4c53 Mon Sep 17 00:00:00 2001
From: Serhiy Mytrovtsiy <mitrovtsiy@ukr.net>
Date: Thu, 5 Nov 2020 13:30:50 +0100
Subject: [PATCH] - fix out of bounds when changing to the chart widget
 (happens only when empty history)

---
 ModuleKit/Widgets/LineChart.swift | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ModuleKit/Widgets/LineChart.swift b/ModuleKit/Widgets/LineChart.swift
index dc548fe8..485facd8 100644
--- a/ModuleKit/Widgets/LineChart.swift
+++ b/ModuleKit/Widgets/LineChart.swift
@@ -251,7 +251,9 @@ public class LineChart: Widget {
     public override func setValues(_ values: [value_t]) {
         let historyValues = values.map{ $0.widget_value }.suffix(60)
         let end = self.chart.points!.count
-        self.chart.points!.replaceSubrange(end-historyValues.count...end-1, with: historyValues)
+        if historyValues.count != 0 {
+            self.chart.points!.replaceSubrange(end-historyValues.count...end-1, with: historyValues)
+        }
         self.display()
     }