[LyX/master] Fix crash on closing of last buffer

commit 0952739c50232635f5e1083b7a1d551e91106e2a
Author: Juergen Spitzmueller <[email protected]>
Date:   Fri Mar 20 17:36:45 2026 +0100

    Fix crash on closing of last buffer
    
    Do not attempt to update the color model in this process
---
 src/frontends/qt/GuiView.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontends/qt/GuiView.cpp b/src/frontends/qt/GuiView.cpp
index c88cdd4f7b..3edfdc29f8 100644
--- a/src/frontends/qt/GuiView.cpp
+++ b/src/frontends/qt/GuiView.cpp
@@ -1742,7 +1742,7 @@ void GuiView::onBufferViewChanged()
 	zoom_out_->setEnabled(currentBufferView()
 			      && zoom_slider_->value() > zoom_slider_->minimum());
 	d.stats_update_trigger_ = true;
-	if (!closing_)
+	if (!closing_ && currentBufferView() && !currentBufferView()->buffer().isClosing())
 		updateColorsModel();
 }
 
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