From bec5f640e40e29b6cc207266514da275ff05605d Mon Sep 17 00:00:00 2001
From: Debian Science Maintainers
 <debian-science-maintainers@lists.alioth.debian.org>
Date: Thu, 5 Feb 2026 20:55:34 +0100
Subject: [PATCH] matplotlib_nullptr_s390x

===================================================================

Gbp-Pq: Name matplotlib_nullptr_s390x.patch
---
 Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.cxx | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.cxx b/Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.cxx
index d8261ac2..dcff6556 100644
--- a/Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.cxx
+++ b/Rendering/Matplotlib/vtkMatplotlibMathTextUtilities.cxx
@@ -1029,6 +1029,12 @@ bool vtkMatplotlibMathTextUtilities::RenderOneCell(vtkImageData* image, int bbox
     {
       unsigned char* ptr = static_cast<unsigned char*>(image->GetScalarPointer(col, row, 0));
 
+      if (ptr == nullptr)
+      {
+	vtkErrorMacro("image returned null ScalarPointer.");
+	return false;
+      }
+
       // Background, do not load python data
       if (row > pythonRowStart || col < pythonColStart || row <= pythonRowEnd ||
         col >= pythonColEnd)
-- 
2.30.2