10.20.2 Bugs Fixed

• Timestamp overflows in updating dynamic code were not handled gracefully.
• restore/1 and load_files/[1,2]: preserving block properties, interaction with atom garbage collection.
• Atom garbage collection bugs: address space dependency, statistics, error handling, interaction with restore/1 and load_files/[1,2].
• The UNIX installer did not install library(spaceout).
• The Windows installer did not install library(debugger_examples).
• Visual Basic interface: PrologGetException and PrologGetString did not work.
• library(spaceout): if space-out was interrupted, e.g. with ^C, then the space-out limit was not reset.
• library(fdbg): fdbg_on/[0,1] was broken.
• library(objects): Operations not permitted on instances now raise permission errors.
• library(gauge): The meaning of ascending and descending `Sort' order was switched.
• library(clpfd):
  • Exceptions raised by the output actions of global constraints were not honored, affecting in particular runs in the scope of a timeout.
  • Signals raising asynchronous exceptions could cause memory leaks, dangling pointers, and crashes.
  • The among/3 option to lex_chain/2 could misbehave.
  • The precedences/1 option to serialized/3 and cumulative/5 could misbehave.
  • Integer division and modulus operations check types more eagerly.
• Reporting system errors could crash on non-english Windows systems.