From 40778f87ef683d46db025a38f0b2d5cd321e2c0f Mon Sep 17 00:00:00 2001
From: f4exb <f4exb06@gmail.com>
Date: Fri, 25 Jun 2021 10:31:40 +0200
Subject: [PATCH] Scope on complex<float>: test m_spectrumVis for mullity
 before attempting to feed data into it

---
 sdrbase/dsp/scopevis.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sdrbase/dsp/scopevis.cpp b/sdrbase/dsp/scopevis.cpp
index f507aaeaf..17869bf6d 100644
--- a/sdrbase/dsp/scopevis.cpp
+++ b/sdrbase/dsp/scopevis.cpp
@@ -760,7 +760,10 @@ int ScopeVis::processTraces(const std::vector<ComplexVector::const_iterator>& vc
     uint32_t shift = (m_timeOfsProMill / 1000.0) * m_traceSize;
     uint32_t length = m_traceSize / m_timeBase;
     int remainder = ilength;
-    m_spectrumVis->feed(vcbegin[0], vcbegin[0] + ilength, false);
+
+    if (m_spectrumVis) {
+        m_spectrumVis->feed(vcbegin[0], vcbegin[0] + ilength, false);
+    }
 
     while ((remainder > 0) && (m_nbSamples > 0))
     {