Fix: Handle default better in curves type count cache

When the curve types array isn't allocated, the default type
is Catmull Rom. Because the type counts are calculated eagerly,
they must be in a valid state.

1 files changed, 7 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/curves_geometry.cc b/source/blender/blenkernel/intern/curves_geometry.cc
index e7337d5c012..4dd0fad57d4 100644
--- a/source/blender/blenkernel/intern/curves_geometry.cc
+++ b/source/blender/blenkernel/intern/curves_geometry.cc
@@ -65,6 +65,8 @@ CurvesGeometry::CurvesGeometry(const int point_size, const int curve_size)
   this->update_customdata_pointers();
 
   this->runtime = MEM_new<CurvesGeometryRuntime>(__func__);
+  /* Fill the type counts with the default so they're in a valid state. */
+  this->runtime->type_counts[CURVE_TYPE_CATMULL_ROM] = curve_size;
 }
 
 /**
@@ -541,7 +543,11 @@ IndexMask CurvesGeometry::indices_for_curve_type(const CurveType type,
   if (this->curve_type_counts()[type] == this->curves_num()) {
     return selection;
   }
-  Span<int8_t> types_span = this->curve_types().get_internal_span();
+  const VArray<int8_t> types = this->curve_types();
+  if (types.is_single()) {
+    return types.get_internal_single() == type ? IndexMask(this->curves_num()) : IndexMask(0);
+  }
+  Span<int8_t> types_span = types.get_internal_span();
   return index_mask_ops::find_indices_based_on_predicate(
       selection, 1024, r_indices, [&](const int index) { return types_span[index] == type; });
 }