From 954d798b756fcd52ea687fb194e9682b1e950daf Mon Sep 17 00:00:00 2001
From: dreamsourcelabTAI <tzz@dreamsourcelab.com>
Date: Thu, 30 Mar 2023 11:19:50 +0800
Subject: [PATCH] fix: If the channel data is single, the cahnnel 2 access it
 cracked

---
 DSView/pv/view/dsosignal.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/DSView/pv/view/dsosignal.cpp b/DSView/pv/view/dsosignal.cpp
index ff080647..eb917049 100644
--- a/DSView/pv/view/dsosignal.cpp
+++ b/DSView/pv/view/dsosignal.cpp
@@ -1449,6 +1449,12 @@ bool DsoSignal::measure(const QPointF &p)
     if (_hover_index >= _data->get_sample_count())
         return false;
 
+    int chan_index = get_index();
+    if (_data->has_data(chan_index) == false){
+        dsv_err("channel %d have no data.", chan_index);
+        return false;
+    }
+
     _hover_point = get_point(_hover_index, _hover_value);
     _hover_en = true;
     return true;