13.7.2 Bugs Fixed

• On Windows the result of absolute_file_name/[2,3] would contain backslash instead of forward slash if the absolute file name contained certain non-ASCII characters. This bug also broke all directory listing functions in library(file_systems), e.g. file_systems:file_member_of_directory/[2,3,4].
• A change in 4.0.3 caused system3:popen/3, system3:shell/[1,2] and system3:system/[1,2] to no longer work when the command string contains redirection and other special constructs. These predicates now always invoke the system shell.
• A change in 4.0.3 caused library(sockets) to not accept a lone port number as an address. A port number Port is now treated the same as inet('', Port), as in earlier releases. This also broke prologbeans:start/[0,1] when no port was specified.
• A few operators had non-ISO mode operator declarations. This has been corrected to match the documentation, the ISO Prolog standard and the ISO language mode in SICStus Prolog 3. See Built-in Operators in the SICStus Prolog Manual.

  Please note: This is an incompatible change that may cause a Prolog program or data to be parsed differently (or not at all). However, in practice we expect this to affect little or no code. Data written using write_canonical/[1,2] or similar will not be affected and will be read back correctly regardless of operator declarations.

  To preserve the old, incorrect, operator declarations, insert the following at the top of your Prolog files:

  :- op( 500,  fx,[+,-]).
  :- op( 300, xfx,[mod,rem]).
  

  To ensure that the new, correct, operator declarations are in effect also in releases predating 4.0.4, insert the following at the top of your Prolog files (please note: this documentation was updated after 4.0.4 to correct the associativity of +, -):

  :- op( 200,  fy,[+,-]).
  :- op( 400, yfx,[mod,rem]).