From 4998f8326bde90cf577da5b82acdd43c4b667c56 Mon Sep 17 00:00:00 2001
From: Oskar Eichler <oskar@songstats.com>
Date: Fri, 28 Aug 2026 03:04:15 +0300
Subject: [PATCH 1/2] Inspect actual methods when protecting OpenStruct fields

---
 lib/ostruct.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/ostruct.rb b/lib/ostruct.rb
index a8763da..ecf37a9 100644
--- a/lib/ostruct.rb
+++ b/lib/ostruct.rb
@@ -252,12 +252,13 @@ def new_ostruct_member!(name) # :nodoc:
   private :new_ostruct_member!
 
   private def is_method_protected!(name) # :nodoc:
-    if !respond_to?(name, true)
+    sc = singleton_class!
+    if !(sc.method_defined?(name) || sc.private_method_defined?(name))
       false
     elsif name.match?(/!$/)
       true
     else
-      owner = method!(name).owner
+      owner = sc.instance_method(name).owner
       if owner.class == ::Class
         owner < ::OpenStruct
       else

From b64c16b2bbfe2c82dcf62b1d3d4f5c0e5f1ea6e8 Mon Sep 17 00:00:00 2001
From: Oskar Eichler <62393985+OskarEichler@users.noreply.github.com>
Date: Fri, 28 Aug 2026 14:56:19 +0300
Subject: [PATCH 2/2] test: cover OpenStruct field collision regression

---
 test/ostruct/test_ostruct.rb | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/ostruct/test_ostruct.rb b/test/ostruct/test_ostruct.rb
index 616f84d..f0cbd7d 100644
--- a/test/ostruct/test_ostruct.rb
+++ b/test/ostruct/test_ostruct.rb
@@ -439,4 +439,10 @@ def test_performance_warning
       )
     end
   end
+  def test_initialize_with_respond_to_field
+    o = OpenStruct.new(respond_to?: false, next_field: 3)
+
+    assert_equal({respond_to?: false, next_field: 3}, o.to_h)
+  end
+
 end