Bugs Fixed in 3.9

• at_end_of_stream/0, get/1, get0/1, put/1, skip/1, tab/1 incorrectly required that the current input stream be a text stream.
• stream_property(S, end_of_stream(...)) now works for tty streams.
• user:goal_expansion/3 was called with the wrong second argument for imported and built-in predicates.
• require/1 was broken.
• The escape sequence \c could be misread.
• In ISO mode, terms were printed with non-ISO escape sequences.
• charsio:format_to_chars/[3,4] are now meta-predicates.
• charsio:format_to_chars/[3,4] is now re-entrant.
• library(clpfd): some Boolean constraints were incorrectly macro-expanded; some type errors merely failed; over-zealous integer overflow detection in arithmetic; unifying domain variables did not work reliably and failed silently when type errors were intended.
• library(clpq,clpr): Variables introduced via ordering/1 were not initialized fully.
• library('linda/client'): shutdown_server/0 now raises an existence error if there is no connection to the server available.
• Emacs line break points now work for module-files.
• Windows now always uses ^Z where UNIX uses ^D to signal end of file on input from the terminal.
• Under Windows, when running SICStus under Emacs, the SICStus process sometimes got stuck in a tight loop when Emacs closed the connection to the SICStus sub-process. It will now exit instead; see Windows limitations.
• Under Windows, splfr now converts the resource name to lowercase. This is to match the fact that SICStus converts path names to lowercase under Windows.
• As of SICStus 3.8.7, for sockets:socket_select/[5,6], signal delivery will be treated as if the select() call had a zero timeout. Such spurious timeouts are now handled invisibly within library(sockets) and will not be seen by user code.