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-rw-r--r--insnhelper.ci3
1 files changed, 2 insertions, 1 deletions
diff --git a/insnhelper.ci b/insnhelper.ci
index d449980671..4cc916f102 100644
--- a/insnhelper.ci
+++ b/insnhelper.ci
@@ -142,7 +142,8 @@ vm_callee_setup_arg(rb_thread_t *th, rb_iseq_t *iseq,
const int opts = iseq->arg_opts - 1 /* no opt */;
if (iseq->arg_rest == -1 && argc > opts) {
- rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", orig_argc, m + opts);
+ rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)",
+ orig_argc, m + opts + iseq->arg_post_len);
}
if (argc > opts) {