1 files changed, 8 insertions, 0 deletions
diff --git a/source/blender/functions/FN_spans.hh b/source/blender/functions/FN_spans.hh
index 2c1257f9ad2..41c930581a4 100644
--- a/source/blender/functions/FN_spans.hh
+++ b/source/blender/functions/FN_spans.hh
@@ -161,6 +161,14 @@ class GMutableSpan {
 
   void *operator[](int64_t index)
   {
+    BLI_assert(index >= 0);
+    BLI_assert(index < size_);
+    return POINTER_OFFSET(data_, type_->size() * index);
+  }
+
+  void *operator[](int64_t index) const
+  {
+    BLI_assert(index >= 0);
     BLI_assert(index < size_);
     return POINTER_OFFSET(data_, type_->size() * index);
   }