From c7d668801bd27f8245a15311da4e8e859ba28dec Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 25 Mar 2020 01:23:03 +0900
Subject: Fixed crash when argument array is modified

---
 test/ruby/test_dir.rb | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'test/ruby/test_dir.rb')

diff --git a/test/ruby/test_dir.rb b/test/ruby/test_dir.rb
index bab23302f7..13a0c31257 100644
--- a/test/ruby/test_dir.rb
+++ b/test/ruby/test_dir.rb
@@ -517,4 +517,16 @@ class TestDir < Test::Unit::TestCase
       assert_equal([*"a".."z"], list)
     end;
   end if defined?(Process::RLIMIT_NOFILE)
+
+  def test_glob_array_with_destructive_element
+    args = Array.new(100, "")
+    pat = Struct.new(:ary).new(args)
+    args.push(pat, *Array.new(100) {"."*40})
+    def pat.to_path
+      ary.clear
+      GC.start
+      ""
+    end
+    assert_empty(Dir.glob(args))
+  end
 end
-- 
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