Commit: 74db65e5424a74d2a9f41785f76232396e4eb664
Author: Campbell Barton
Date:   Thu Dec 6 11:27:57 2018 +1100
Branches: blender2.8
https://developer.blender.org/rB74db65e5424a74d2a9f41785f76232396e4eb664

Merge branch 'master' into blender2.8

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



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

diff --cc source/blender/editors/sculpt_paint/paint_vertex_weight_ops.c
index 464b7b8ad2e,28f5c1304c8..7ed1691992f
--- a/source/blender/editors/sculpt_paint/paint_vertex_weight_ops.c
+++ b/source/blender/editors/sculpt_paint/paint_vertex_weight_ops.c
@@@ -692,15 -687,17 +692,17 @@@ static int paint_weight_gradient_modal(
  
        if (ret & OPERATOR_CANCELLED) {
                Object *ob = CTX_data_active_object(C);
-               Mesh *me = ob->data;
-               if (vert_cache->wpp.wpaint_prev) {
-                       BKE_defvert_array_free_elems(me->dvert, me->totvert);
-                       BKE_defvert_array_copy(me->dvert, 
vert_cache->wpp.wpaint_prev, me->totvert);
-                       wpaint_prev_destroy(&vert_cache->wpp);
+               if (vert_cache != NULL) {
+                       Mesh *me = ob->data;
+                       if (vert_cache->wpp.wpaint_prev) {
+                               BKE_defvert_array_free_elems(me->dvert, 
me->totvert);
+                               BKE_defvert_array_copy(me->dvert, 
vert_cache->wpp.wpaint_prev, me->totvert);
+                               wpaint_prev_destroy(&vert_cache->wpp);
+                       }
+                       MEM_freeN(vert_cache);
                }
-               MEM_freeN(vert_cache);
  
 -              DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
 +              DEG_id_tag_update(&ob->id, OB_RECALC_DATA);
                WM_event_add_notifier(C, NC_OBJECT | ND_DRAW, ob);
        }
        else if (ret & OPERATOR_FINISHED) {

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