Limit maximum number of IVs on a shape

Create SHAPE_MAX_NUM_IVS (currently 50) and limit all shapes to that
number of IVs. When a shape has more than 50 IVs, fallback to the
obj_too_complex shape which uses hash lookup for ivs.

1 files changed, 1 insertions, 1 deletions

diff --git a/shape.c b/shape.c
index f3150127ff..e7dd85c3f7 100644
--- a/shape.c
+++ b/shape.c
@@ -139,7 +139,7 @@ get_next_shape_internal(rb_shape_t * shape, ID id, enum shape_type shape_type, b
 
     *variation_created = false;
 
-    if (new_shapes_allowed) {
+    if (new_shapes_allowed && shape->next_iv_index < SHAPE_MAX_NUM_IVS) {
         RB_VM_LOCK_ENTER();
         {
             bool had_edges = !!shape->edges;