From 8b73371f99c61224c02616f0bcb51056451e7997 Mon Sep 17 00:00:00 2001
From: Oskar Eichler <oskar@songstats.com>
Date: Fri, 28 Aug 2026 02:49:30 +0300
Subject: [PATCH 1/2] Compare the missing-default sentinel by identity

---
 lib/pstore.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/pstore.rb b/lib/pstore.rb
index e730be2..11db0fa 100644
--- a/lib/pstore.rb
+++ b/lib/pstore.rb
@@ -439,7 +439,7 @@ def [](key)
   def fetch(key, default=PStore::Error)
     in_transaction
     unless @table.key? key
-      if default == PStore::Error
+      if PStore::Error.equal?(default)
         raise PStore::Error, format("undefined key '%s'", key)
       else
         return default

From 4da003797d7e4c581a8569c2df2431cf4dd25742 Mon Sep 17 00:00:00 2001
From: Oskar Eichler <62393985+OskarEichler@users.noreply.github.com>
Date: Fri, 28 Aug 2026 14:59:58 +0300
Subject: [PATCH 2/2] test: cover PStore regression

---
 test/test_pstore.rb | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/test/test_pstore.rb b/test/test_pstore.rb
index 4a65e4f..6a3e747 100644
--- a/test/test_pstore.rb
+++ b/test/test_pstore.rb
@@ -190,4 +190,13 @@ def clear_store
   def second_file
     File.join(Dir.tmpdir, "pstore.tmp2.#{Process.pid}")
   end
+  def test_fetch_compares_missing_default_by_identity
+    default = Object.new
+    def default.==(_other)
+      true
+    end
+
+    assert_same(default, @pstore.transaction(true) { @pstore.fetch(:missing, default) })
+  end
+
 end