10.21.2 Bugs Fixed

• Stream positions for write mode incompatible with those for read mode.
• The format specs `~Nd', `~ND', `~Nr', and `~NR' don't work if the argument is a large integer.
• profile_data/4 could fail unexpectedly on large clauses.
• Backtracking into interpreted code could cause crash later.
• CLPFD: cumulatives/3 could crash, all_distinct/[1,2] could misbehave, serialized/[2,3] and cumulative/[4,5] were treated incorrectly by the FDBG debugger.
• Tcl/Tk: library(tcltk) now calls Tcl_Finalize explicitly when the tcltk foreign resource is unloaded. This prevents a hang on Windows when SICStus exits.
• The find this (.) debugger command now correctly displays the defining file also for imported predicates.
• source_file/2 now finds the defining file also for imported predicates.
• Loading malformed clauses could cause crash.
• halt/0 could loop infinitely.
• Inconsistent state upon memory resource error could cause crash.
• Error reporting may crash with a memory access error on non-English Windows systems. One way this can happen is when trying to connect to a non-listening socket.