frozen state should be restored after txn is aborted

activerecord/lib/active_record/transactions.rb

@@ -329,6 +329,7 @@ module ActiveRecord
         @_start_transaction_state[:destroyed] = @destroyed
       end
       @_start_transaction_state[:level] = (@_start_transaction_state[:level] || 0) + 1
+      @_start_transaction_state[:frozen?] = @attributes.frozen?
     end
 
     # Clear the new record state and id of a record.
@@ -345,8 +346,8 @@ module ActiveRecord
         @_start_transaction_state[:level] = (@_start_transaction_state[:level] || 0) - 1
         if @_start_transaction_state[:level] < 1 || force
           restore_state = remove_instance_variable(:@_start_transaction_state)
-          was_frozen = @attributes.frozen?
-          @attributes = @attributes.dup if was_frozen
+          was_frozen = restore_state[:frozen?]
+          @attributes = @attributes.dup if @attributes.frozen?
           @new_record = restore_state[:new_record]
           @destroyed  = restore_state[:destroyed]
           if restore_state.has_key?(:id)

activerecord/test/cases/transactions_test.rb

@@ -14,6 +14,21 @@ class TransactionTest < ActiveRecord::TestCase
     @first, @second = Topic.find(1, 2).sort_by { |t| t.id }
   end
 
+  def test_raise_after_destroy
+    assert !@first.frozen?
+
+    assert_raises(RuntimeError) {
+      Topic.transaction do
+        @first.destroy
+        assert @first.frozen?
+        raise
+      end
+    }
+
+    assert @first.reload
+    assert !@first.frozen?
+  end
+
   def test_successful
     Topic.transaction do
       @first.approved  = true