From 877eaa5895001534ef0396bed5d77815df6e6521 Mon Sep 17 00:00:00 2001
From: Casper Jeukendrup <48658420+cbjeukendrup@users.noreply.github.com>
Date: Mon, 13 May 2024 16:01:59 +0200
Subject: [PATCH] Fix crash when opening score where TAB clefs are not shown

---
 src/engraving/rendering/dev/measurelayout.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/engraving/rendering/dev/measurelayout.cpp b/src/engraving/rendering/dev/measurelayout.cpp
index 3de5e0e7849c..b487d850e1ae 100644
--- a/src/engraving/rendering/dev/measurelayout.cpp
+++ b/src/engraving/rendering/dev/measurelayout.cpp
@@ -1731,7 +1731,8 @@ void MeasureLayout::addSystemHeader(Measure* m, bool isFirstSystem, LayoutContex
                 if (isFirstClef && searchMeasure->tick() >= clefTick) {
                     // Need to check previous measure for clef change if one not found in this measure
                     Segment* clefSeg = searchMeasure->findFirstR(SegmentType::Clef | SegmentType::HeaderClef, Fraction(0, 0));
-                    if (Measure* prevMeas = searchMeasure->prevMeasure(); !clefSeg) {
+                    Measure* prevMeas = searchMeasure->prevMeasure();
+                    if (prevMeas && !clefSeg) {
                         clefSeg = prevMeas->findSegment(SegmentType::Clef, m->tick());
                     }
                     if (clefSeg && clefSeg->enabled()) {