From 9cb33aad55e0a2cded3b09b0509b9c53fb0fa5ae Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 13 Sep 2023 23:33:19 +0900
Subject: [Bug #19877] Fix flip-flop in block

---
 test/ruby/test_parse.rb | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'test/ruby')

diff --git a/test/ruby/test_parse.rb b/test/ruby/test_parse.rb
index 0f71e11f7e..2f1a522dc2 100644
--- a/test/ruby/test_parse.rb
+++ b/test/ruby/test_parse.rb
@@ -465,6 +465,21 @@ class TestParse < Test::Unit::TestCase
     assert_parse_error(%q[def (:"#{42}").foo; end], msg)
   end
 
+  def test_flip_flop
+    [
+      '((cond1..cond2))',
+      '(; cond1..cond2)',
+      '(1; cond1..cond2)',
+      '(%s(); cond1..cond2)',
+      '(%w(); cond1..cond2)',
+      '(1; (2; (3; 4; cond1..cond2)))',
+      '(1+1; cond1..cond2)',
+    ].each do |code|
+      code = code.sub("cond1", "n==4").sub("cond2", "n==5")
+      assert_equal([4,5], eval("(1..9).select {|n| true if #{code}}"))
+    end
+  end
+
   def test_op_asgn1_with_block
     t = Object.new
     a = []
-- 
cgit v1.2.3