1 files changed, 1 insertions, 0 deletions
diff --git a/vm.c b/vm.c
index 793b9fd30a..519c4aba6e 100644
--- a/vm.c
+++ b/vm.c
@@ -1395,6 +1395,7 @@ rb_vm_mark(void *ptr)
 	RUBY_MARK_UNLESS_NULL(vm->load_path);
 	RUBY_MARK_UNLESS_NULL(vm->loaded_features);
 	RUBY_MARK_UNLESS_NULL(vm->top_self);
+	RUBY_MARK_UNLESS_NULL(vm->coverages);
 	rb_gc_mark_locations(vm->special_exceptions, vm->special_exceptions + ruby_special_error_count - 1);
 
 	if (vm->loading_table) {