Commit: e16ef56a0dd02f882adaca1f7ea52cc2b02469f8
Author: Clément Foucault
Date:   Thu Nov 22 16:55:23 2018 +0100
Branches: blender2.8
https://developer.blender.org/rBe16ef56a0dd02f882adaca1f7ea52cc2b02469f8

Fix T57980: Assert failure in draw manager when opening file

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

M       source/blender/draw/modes/overlay_mode.c

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

diff --git a/source/blender/draw/modes/overlay_mode.c 
b/source/blender/draw/modes/overlay_mode.c
index cb80b1f2a61..2409d4033e0 100644
--- a/source/blender/draw/modes/overlay_mode.c
+++ b/source/blender/draw/modes/overlay_mode.c
@@ -279,11 +279,13 @@ static void overlay_cache_populate(void *vedata, Object 
*ob)
                        else if (is_flat_object_viewed_from_side) {
                                /* Avoid losing flat objects when in ortho 
views (see T56549) */
                                struct GPUBatch *geom = 
DRW_cache_object_wire_outline_get(ob);
-                               GPUShader *sh = 
GPU_shader_get_builtin_shader(GPU_SHADER_3D_UNIFORM_COLOR);
-                               shgrp = DRW_shgroup_create(sh, 
psl->flat_wireframe_pass);
-                               DRW_shgroup_stencil_mask(shgrp, stencil_mask);
-                               DRW_shgroup_uniform_vec4(shgrp, "color", 
ts.colorWire, 1);
-                               DRW_shgroup_call_object_add(shgrp, geom, ob);
+                               if (geom) {
+                                       GPUShader *sh = 
GPU_shader_get_builtin_shader(GPU_SHADER_3D_UNIFORM_COLOR);
+                                       shgrp = DRW_shgroup_create(sh, 
psl->flat_wireframe_pass);
+                                       DRW_shgroup_stencil_mask(shgrp, 
stencil_mask);
+                                       DRW_shgroup_uniform_vec4(shgrp, 
"color", ts.colorWire, 1);
+                                       DRW_shgroup_call_object_add(shgrp, 
geom, ob);
+                               }
                        }
                        else {
                                int tri_count;

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