From b04506cdcc4e389c9e157cefe6c3ad9e6afab7ca Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Mon, 31 Dec 2018 12:50:13 +0900
Subject: Should not check non-node value to `void_expr_error`; fix #4203

This is also a reason for #4192 as well.
---
 mrbgems/mruby-compiler/core/parse.y | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/mrbgems/mruby-compiler/core/parse.y b/mrbgems/mruby-compiler/core/parse.y
index 0e67e5881..6a2defa8f 100644
--- a/mrbgems/mruby-compiler/core/parse.y
+++ b/mrbgems/mruby-compiler/core/parse.y
@@ -795,6 +795,13 @@ new_masgn(parser_state *p, node *a, node *b)
   return cons((node*)NODE_MASGN, cons(a, b));
 }
 
+/* (:masgn mlhs mrhs) no check */
+static node*
+new_masgn_param(parser_state *p, node *a, node *b)
+{
+  return cons((node*)NODE_MASGN, cons(a, b));
+}
+
 /* (:asgn lhs rhs) */
 static node*
 new_op_asgn(parser_state *p, node *a, mrb_sym op, node *b)
@@ -3302,7 +3309,7 @@ f_arg_item      : f_norm_arg
                     }
                   f_margs rparen
                     {
-                      $$ = new_masgn(p, $3, p->locals->car);
+                      $$ = new_masgn_param(p, $3, p->locals->car);
                       local_resume(p, $<nd>2);
                       local_add_f(p, 0);
                     }
-- 
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