glTF export: Fix crash when invalid driver

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, 30),
+    "version": (1, 7, 31),
     'blender': (2, 91, 0),
     'location': 'File > Import-Export',
     'description': 'Import-Export as glTF 2.0',

io_scene_gltf2/blender/exp/gltf2_blender_gather_drivers.py

@@ -53,6 +53,11 @@ def get_sk_drivers(blender_armature):
         for sk_c in child.data.shape_keys.animation_data.drivers:
             # Check if driver is valid. If not, ignore this driver channel
             try:
+                # Check if driver is valid.
+                # Try/Except is no more a suffisant check, starting with version Blender 3.0,
+                # Blender crashs when trying to resolve path on invalid driver
+                if not sk_c.is_valid:
+                    continue
                 sk_name = child.data.shape_keys.path_resolve(get_target_object_path(sk_c.data_path)).name
             except:
                 continue