glTF importer: fix T91217: avoid traceback when trying to import some invalid glTF 2.0 files

Referenced by issue #91217, Python exception while importing glb

io_scene_gltf2/__init__.py

@@ -15,7 +15,7 @@
 bl_info = {
     'name': 'glTF 2.0 format',
     'author': 'Julien Duroure, Scurest, Norbert Nopper, Urs Hanselmann, Moritz Becher, Benjamin Schmithüsen, Jim Eckerlein, and many external contributors',
-    "version": (1, 7, 24),
+    "version": (1, 7, 25),
     'blender': (2, 91, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/imp/gltf2_blender_node.py

@@ -184,6 +184,10 @@ class BlenderNode():
     @staticmethod
     def create_mesh_object(gltf, vnode):
         pynode = gltf.data.nodes[vnode.mesh_node_idx]
+        if not (0 <= pynode.mesh < len(gltf.data.meshes)):
+            # Avoid traceback for invalid gltf file: invalid reference to meshes array
+            # So return an empty blender object)
+            return bpy.data.objects.new(vnode.name or mesh.name, None)
         pymesh = gltf.data.meshes[pynode.mesh]
 
         # Key to cache the Blender mesh by.