title: Failed to load a library with logtalk_load using logtalk 3.0.0.1
body: <p>I use <code>SWI Prolog</code> as a backed compiler(v 6.6.1). After installing <code>logtalk</code> 3.0.0.1 I started getting error when</p>
  <blockquote>
  <p>logtalk_load(library(types_loader), [source_data(on), report(on)]).</p>
  <p>% [ c:/users/dizqj373/documents/logtalk/library/termp.lgt loaded ]
  !     Domain error: value alias/2 is not in domain directive
  !       in directive :- alias(termp,[variables/2 as vars/2])
  !       in file c:/users/dizqj373/documents/logtalk/library/term.lgt between lines 36-37
  Warning: [Thread 2] c:/users/dizqj373/documents/logtalk/library/lgt_tmp/types_loader.pl:5: Initialization goal failed
  % [ c:/users/dizqj373/documents/logtalk/library/types_loader.lgt loaded ]
  true.</p>
  </blockquote>
  <p>Could you help me and guide a little bit what could be wrong?
  thanks!</p>