From ed9d9cee76ee941c504ccea33c70c0eb5d825813 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@ruby-lang.org>
Date: Sat, 18 Sep 2021 21:28:35 +0900
Subject: ast.c: AST.of checks if a given method object is defined in C

[Bug #18178]
---
 ast.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'ast.c')

diff --git a/ast.c b/ast.c
index 202527f53f..e1c044e24c 100644
--- a/ast.c
+++ b/ast.c
@@ -213,6 +213,9 @@ ast_s_of(rb_execution_context_t *ec, VALUE module, VALUE body, VALUE keep_script
         else {
             iseq = rb_method_iseq(body);
         }
+        if (!iseq) {
+            rb_raise(rb_eArgError, "cannot get AST for method that is not defined in Ruby");
+        }
         if (rb_iseq_from_eval_p(iseq)) {
             rb_raise(rb_eArgError, "cannot get AST for method defined in eval");
         }
-- 
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