From 367451dc041f5368382e2d55f43ed03ea2468df6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20K=C3=A4berich?= <j.kaeberich@gmx.de>
Date: Wed, 5 Jan 2022 22:12:24 +0100
Subject: [PATCH] prevent crash on invalid log scale settings

---
 Software/PC_Application/Traces/tracexyplot.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Software/PC_Application/Traces/tracexyplot.cpp b/Software/PC_Application/Traces/tracexyplot.cpp
index 4bd2c4e..7d75e06 100644
--- a/Software/PC_Application/Traces/tracexyplot.cpp
+++ b/Software/PC_Application/Traces/tracexyplot.cpp
@@ -662,8 +662,13 @@ void TraceXYPlot::updateAxisTicks()
     };
 
     auto createLogarithmicTicks = [](vector<double>& ticks, double start, double stop, int minDivisions) {
-        Q_ASSERT(stop > start);
-        Q_ASSERT(start > 0);
+        // enforce usable log settings
+        if(start <= 0) {
+            start = 1.0;
+        }
+        if(stop <= start) {
+            stop = start + 1.0;
+        }
         ticks.clear();
 
         auto decades = log10(stop) - log10(start);