Raised when a lockfile cannot be parsed
Raises a ParseError with the given message which was encountered at a line and column while parsing.
 
               # File rubygems/request_set/lockfile.rb, line 32
def initialize message, column, line, path
  @line   = line
  @column = column
  @path   = path
  super "#{message} (at line #{line} column #{column})"
end