# File lib/passenger/utils.rb, line 153
153:         def backtrace_string(current_location = nil)
154:                 if current_location.nil?
155:                         location = nil
156:                 else
157:                         location = "in #{current_location} "
158:                 end
159:                 return "*** Exception #{self.class} #{location}" <<
160:                         "(#{self}) (process #{$$}):\n" <<
161:                         "\tfrom " << backtrace.join("\n\tfrom ")
162:         end