From 6f0585fa4afe1d96e7994b705122547a0c35dd1a Mon Sep 17 00:00:00 2001
From: Bastien Montagne <montagne29@wanadoo.fr>
Date: Fri, 2 Aug 2019 18:23:57 +0200
Subject: Fix T68135: Empty curve object crashes export (STL exporter part).

---
 io_mesh_stl/blender_utils.py | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'io_mesh_stl')

diff --git a/io_mesh_stl/blender_utils.py b/io_mesh_stl/blender_utils.py
index d61adf31..d1b14cf6 100644
--- a/io_mesh_stl/blender_utils.py
+++ b/io_mesh_stl/blender_utils.py
@@ -87,10 +87,13 @@ def faces_from_mesh(ob, global_matrix, use_mesh_modifiers=False):
     else:
         mesh_owner = ob
 
+    # Object.to_mesh() is not guaranteed to return a mesh.
     try:
         mesh = mesh_owner.to_mesh()
     except RuntimeError:
         return
+    if mesh is None:
+        return
 
     mat = global_matrix @ ob.matrix_world
     mesh.transform(mat)
-- 
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