[Bf-blender-cvs] [1a30687c24b] blender-v2.92-release: Fix undo crash on active object change without exiting edit-mode
Campbell Barton
noreply at git.blender.org
Fri Jan 22 05:44:17 CET 2021
Commit: 1a30687c24be7899d0835d4c3572d7dc0f1a5656
Author: Campbell Barton
Date: Fri Jan 22 15:23:34 2021 +1100
Branches: blender-v2.92-release
https://developer.blender.org/rB1a30687c24be7899d0835d4c3572d7dc0f1a5656
Fix undo crash on active object change without exiting edit-mode
While the previous fix for T84920 is correct, the crash could still be
triggered by changing the active object while in edit-mode.
Ensure stale data isn't used by tagging for depsgraph update when
edit-mode data is freed on undo.
While exiting edit-mode normally does this, it's possible to set the
active object to a non edit-mode mesh, skipping the mode-switch
operator and it's depsgraph tagging.
===================================================================
M source/blender/editors/util/ed_util.c
===================================================================
diff --git a/source/blender/editors/util/ed_util.c b/source/blender/editors/util/ed_util.c
index 4b1335cf047..c59fbbe1646 100644
--- a/source/blender/editors/util/ed_util.c
+++ b/source/blender/editors/util/ed_util.c
@@ -194,6 +194,17 @@ void ED_editors_exit(Main *bmain, bool do_undo_system)
}
}
+ /* On undo, tag for update so the depsgraph doesn't use stale edit-mode data,
+ * this is possible when mixing edit-mode and memory-file undo.
+ *
+ * By convention, objects are not left in edit-mode - so this isn't often problem in practice,
+ * since exiting edit-mode will tag the objects too.
+ *
+ * However there is no guarantee the active object _never_ changes while in edit-mode.
+ * Python for example can do this, some callers to #ED_object_base_activate
+ * don't handle modes either (doing so isn't always practical).
+ *
+ * To reproduce the problem where stale data is used, see: T84920. */
for (Object *ob = bmain->objects.first; ob; ob = ob->id.next) {
if (ob->type == OB_MESH) {
Mesh *me = ob->data;
@@ -201,12 +212,18 @@ void ED_editors_exit(Main *bmain, bool do_undo_system)
EDBM_mesh_free(me->edit_mesh);
MEM_freeN(me->edit_mesh);
me->edit_mesh = NULL;
+ if (do_undo_system == false) {
+ DEG_id_tag_update(&ob->id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
+ }
}
}
else if (ob->type == OB_ARMATURE) {
bArmature *arm = ob->data;
if (arm->edbo) {
ED_armature_edit_free(ob->data);
+ if (do_undo_system == false) {
+ DEG_id_tag_update(&ob->id, ID_RECALC_TRANSFORM | ID_RECALC_GEOMETRY);
+ }
}
}
}
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