missing_name()
public
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def missing_name
message = respond_to?(:original_message) ? original_message : self.message
return unless message.start_with?("uninitialized constant ")
receiver = begin
self.receiver
rescue ArgumentError
nil
end
if receiver == Object
name.to_s
elsif receiver
"#{real_mod_name(receiver)}::#{self.name}"
else
if match = message.match(/((::)?([A-Z]\w*)(::[A-Z]\w*)*)$/)
match[1]
end
end
end