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-rw-r--r--activerecord/lib/active_record/relation/spawn_methods.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/relation/spawn_methods.rb b/activerecord/lib/active_record/relation/spawn_methods.rb
index dd3610d7aa..70da37fa84 100644
--- a/activerecord/lib/active_record/relation/spawn_methods.rb
+++ b/activerecord/lib/active_record/relation/spawn_methods.rb
@@ -32,7 +32,7 @@ module ActiveRecord
elsif other
spawn.merge!(other)
else
- self
+ raise ArgumentError, "invalid argument: #{other.inspect}."
end
end