Commit: 934b9e80d02f4a3d6e99a9f3228f9e0959bd88dc
Author: Bastien Montagne
Date:   Fri Jun 8 15:42:37 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB934b9e80d02f4a3d6e99a9f3228f9e0959bd88dc

Add check in BKE_pbvh_apply_vertCos that number of deforming cos matches number 
of pbvh vertices.

This shall help catching issues in future.

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

M       source/blender/blenkernel/BKE_pbvh.h
M       source/blender/blenkernel/intern/cdderivedmesh.c
M       source/blender/blenkernel/intern/paint.c
M       source/blender/blenkernel/intern/pbvh.c
M       source/blender/blenkernel/intern/subsurf_ccg.c
M       source/blender/editors/sculpt_paint/sculpt_undo.c

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

diff --git a/source/blender/blenkernel/BKE_pbvh.h 
b/source/blender/blenkernel/BKE_pbvh.h
index c18288de1bc..78c766f6115 100644
--- a/source/blender/blenkernel/BKE_pbvh.h
+++ b/source/blender/blenkernel/BKE_pbvh.h
@@ -240,7 +240,7 @@ void BKE_pbvh_node_layer_disp_free(PBVHNode *node);
 
 /* vertex deformer */
 float (*BKE_pbvh_get_vertCos(struct PBVH *pbvh))[3];
-void BKE_pbvh_apply_vertCos(struct PBVH *pbvh, float (*vertCos)[3]);
+void BKE_pbvh_apply_vertCos(struct PBVH *pbvh, float (*vertCos)[3], const int 
totvert);
 bool BKE_pbvh_isDeformed(struct PBVH *pbvh);
 
 /* Vertex Iterator */
diff --git a/source/blender/blenkernel/intern/cdderivedmesh.c 
b/source/blender/blenkernel/intern/cdderivedmesh.c
index 13b2a3a5d64..7bcc05b0e37 100644
--- a/source/blender/blenkernel/intern/cdderivedmesh.c
+++ b/source/blender/blenkernel/intern/cdderivedmesh.c
@@ -325,7 +325,7 @@ static PBVH *cdDM_getPBVH(Object *ob, DerivedMesh *dm)
                        totvert = deformdm->getNumVerts(deformdm);
                        vertCos = MEM_malloc_arrayN(totvert, sizeof(float[3]), 
"cdDM_getPBVH vertCos");
                        deformdm->getVertCos(deformdm, vertCos);
-                       BKE_pbvh_apply_vertCos(cddm->pbvh, vertCos);
+                       BKE_pbvh_apply_vertCos(cddm->pbvh, vertCos, totvert);
                        MEM_freeN(vertCos);
                }
        }
diff --git a/source/blender/blenkernel/intern/paint.c 
b/source/blender/blenkernel/intern/paint.c
index 2fded4aeac9..620903cf97b 100644
--- a/source/blender/blenkernel/intern/paint.c
+++ b/source/blender/blenkernel/intern/paint.c
@@ -946,7 +946,7 @@ void BKE_sculpt_update_mesh_elements(
                        ss->orig_cos = (ss->kb) ? 
BKE_keyblock_convert_to_vertcos(ob, ss->kb) : BKE_mesh_vertexCos_get(me, NULL);
 
                        BKE_crazyspace_build_sculpt(depsgraph, scene, ob, 
&ss->deform_imats, &ss->deform_cos);
-                       BKE_pbvh_apply_vertCos(ss->pbvh, ss->deform_cos);
+                       BKE_pbvh_apply_vertCos(ss->pbvh, ss->deform_cos, 
me->totvert);
 
                        for (a = 0; a < me->totvert; ++a) {
                                invert_m3(ss->deform_imats[a]);
@@ -970,7 +970,7 @@ void BKE_sculpt_update_mesh_elements(
                        if (vertCos) {
                                if (!pbvh_deformed) {
                                        /* apply shape keys coordinates to PBVH 
*/
-                                       BKE_pbvh_apply_vertCos(ss->pbvh, 
vertCos);
+                                       BKE_pbvh_apply_vertCos(ss->pbvh, 
vertCos, me->totvert);
                                }
                                if (ss->deform_cos == NULL) {
                                        ss->deform_cos = vertCos;
diff --git a/source/blender/blenkernel/intern/pbvh.c 
b/source/blender/blenkernel/intern/pbvh.c
index 7b53c5f8811..8cc8a8510f2 100644
--- a/source/blender/blenkernel/intern/pbvh.c
+++ b/source/blender/blenkernel/intern/pbvh.c
@@ -2189,8 +2189,13 @@ float (*BKE_pbvh_get_vertCos(PBVH *pbvh))[3]
        return vertCos;
 }
 
-void BKE_pbvh_apply_vertCos(PBVH *pbvh, float (*vertCos)[3])
+void BKE_pbvh_apply_vertCos(PBVH *pbvh, float (*vertCos)[3], const int totvert)
 {
+       if (totvert != pbvh->totvert) {
+               BLI_assert(!"PBVH: Given deforming vcos number does not natch 
PBVH vertex number!");
+               return;
+       }
+
        if (!pbvh->deformed) {
                if (pbvh->verts) {
                        /* if pbvh is not already deformed, verts/faces points 
to the */
diff --git a/source/blender/blenkernel/intern/subsurf_ccg.c 
b/source/blender/blenkernel/intern/subsurf_ccg.c
index ef49a7af5f3..d735944c93d 100644
--- a/source/blender/blenkernel/intern/subsurf_ccg.c
+++ b/source/blender/blenkernel/intern/subsurf_ccg.c
@@ -2352,7 +2352,7 @@ static struct PBVH *ccgDM_getPBVH(Object *ob, DerivedMesh 
*dm)
                        totvert = deformdm->getNumVerts(deformdm);
                        vertCos = MEM_malloc_arrayN(totvert, sizeof(float[3]), 
"ccgDM_getPBVH vertCos");
                        deformdm->getVertCos(deformdm, vertCos);
-                       BKE_pbvh_apply_vertCos(ccgdm->pbvh, vertCos);
+                       BKE_pbvh_apply_vertCos(ccgdm->pbvh, vertCos, totvert);
                        MEM_freeN(vertCos);
                }
        }
diff --git a/source/blender/editors/sculpt_paint/sculpt_undo.c 
b/source/blender/editors/sculpt_paint/sculpt_undo.c
index 01b879a4c34..2872ad4fb9c 100644
--- a/source/blender/editors/sculpt_paint/sculpt_undo.c
+++ b/source/blender/editors/sculpt_paint/sculpt_undo.c
@@ -198,7 +198,7 @@ static bool sculpt_undo_restore_coords(bContext *C, 
DerivedMesh *dm, SculptUndoN
 
                        /* pbvh uses it's own mvert array, so coords should be 
*/
                        /* propagated to pbvh here */
-                       BKE_pbvh_apply_vertCos(ss->pbvh, vertCos);
+                       BKE_pbvh_apply_vertCos(ss->pbvh, vertCos, 
unode->totvert);
 
                        MEM_freeN(vertCos);
                }

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