class Psych::SyntaxError

def initialize file, line, col, offset, problem, context
  err      = [problem, context].compact.join ' '
  filename = file || '<unknown>'
  message  = "(%s): %s at line %d column %d" % [filename, err, line, col]
  @file    = file
  @line    = line
  @column  = col
  @offset  = offset
  @problem = problem
  @context = context
  super(message)
end