# File lib/passenger/utils.rb, line 275
275:         def backtrace_string(current_location = nil)
276:                 if current_location.nil?
277:                         location = nil
278:                 else
279:                         location = "in #{current_location} "
280:                 end
281:                 return "*** Exception #{self.class} #{location}" <<
282:                         "(#{self}) (process #{$$}):\n" <<
283:                         "\tfrom " << backtrace.join("\n\tfrom ")
284:         end