1 files changed, 4 insertions, 0 deletions
diff --git a/load.c b/load.c
index d171e1d92b..c29c32f2dc 100644
--- a/load.c
+++ b/load.c
@@ -657,6 +657,10 @@ rb_provide_feature(rb_vm_t *vm, VALUE feature)
     rb_str_freeze(feature);
 
     get_loaded_features_index(vm);
+    // If loaded_features and loaded_features_snapshot share the same backing
+    // array, pushing into it would cause the whole array to be copied.
+    // To avoid this we first clear loaded_features_snapshot.
+    rb_ary_clear(vm->loaded_features_snapshot);
     rb_ary_push(features, rb_fstring(feature));
     features_index_add(vm, feature, INT2FIX(RARRAY_LEN(features)-1));
     reset_loaded_features_snapshot(vm);