class Puma::ErrorLogger

def debug(options={})


and before all remaining info.
- +text+ (default nil) custom string to print in title
- +req+ the http request
- +error+ is an exception object
+options+ hash with additional options:
environment variable PUMA_DEBUG is defined.
Print occurred error details only if 
def debug(options={})
  return unless @debug
  error = options[:error]
  req = options[:req]
  string_block = []
  string_block << title(options)
  string_block << request_dump(req) if request_parsed?(req)
  string_block << error.backtrace if error
  internal_write string_block.join("\n")
end