1 files changed, 1 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index 94d2ae5f4..63f161cc5 100644
--- a/thread.c
+++ b/thread.c
@@ -321,7 +321,7 @@ thread_start_func_2(rb_thread_t *th, VALUE *stack_start, VALUE *register_stack_s
 		    th->local_lfp = proc->block.lfp;
 		    th->local_svar = Qnil;
 		    th->value = vm_invoke_proc(th, proc, proc->block.self,
-					       RARRAY_LEN(args), RARRAY_PTR(args));
+					       RARRAY_LEN(args), RARRAY_PTR(args), 0);
 		}
 		else {
 		    th->value = (*th->first_func)((void *)th->first_args);