SWI-Prolog Changelog from version 7.3.8 to 7.3.9

[Oct 12 2015]

FIXED: X is Y+1 with Y unbound could crash when traced using a Prolog-defined debugger (graphical debugger or SWISH IDE) due to a wrongly created reference pointer for the explicit is/2 call.
FIXED: Colouring refused op(P,T,[]), which is not allowed in ISO, but is allowed in SWI-Prolog.
FIXED: write_term/2,3: Only call portray_goal option value on non-text blobs if blobs(portray) is used.

[Oct 11 2015]

DOC: win_file_access_check flag.
MODIFIED: renamed win_file_security_check flag into win_file_access_check with the values access, filesecurity and openclose.

[Oct 9 2015]

ADDED: library(dicts): dicts_join/3,4, dicts_slice/3. Deleted dicts_join/6, which can be replaced with dicts_join/4 and dicts_slice/3.
FIXED: Comparison operators wrt -0.0.
DEBUG: include the thread-alias and time stamp in an assertion-failure and fatal signal messages to simplify debugging.

[Oct 7 2015]

DOC: Typo.
ADDED: library(dicts), providing (mostly) operations on lists of dicts.
MODIFIED: library(ugraphs): renamed transpose/2 to transpose_ugraph/2 to avoid confusion with transpose/2 as it is currently available from library(clpfd), which will probably be moved elsewhere. As library(ugraphs) is not used very much, we expect few compatibility issues. If you use transpose from library(ugraphs) and wish to remain compatible with older versions, use
:- if(\+current_predicate(transpose_ugraphs/2)). transpose_ugraphs(In, Out) :- transpose(In,Out). :- endif.

[Oct 5 2015]

FIXED: crash when resizing hash-tables if another thread has partially inserted a record

Package clib

[Oct 11 2015]

FIXED: Windows socket interface: the socket could be destroyed by processing FD_CLOSE in the socket thread before it was close from Prolog. We now only destroy the socket after (1) Prolog either called tcp_close_socket/1 or closed both the input and output stream and (2) Windows has seen the FD_CLOSE event. (1) uses a new flag PLSOCK_VIRGIN that protects the socket before tcp_open_socket/3 is called. This flag is reset by either calling tcp_open_socket/3 or tcp_close_socket/1.

[Oct 8 2015]

FIXED: Possible crash releasing a socket in Windows. releaseSocketWhenPossible() can release the socket while it is still being used by socket_wnd_proc().

[Oct 10 2015]

[Oct 2 2015]

WORKAROUND: http_open/3: skip illegal HTTP headers with a warning that are parsed due to the headers(-List) option.
ADDED: Option max_redirect/1 that throws an exception when a given HTTP redirection length is reached. This avoids redirection chains of indefinite length that do not loop.

[Oct 12 2015]

FIXED: Handle output event that happen before the create event as a result of compiler warnings in the Prolog client.
ENHANCED: Send non-text blobs as '$BLOB'(Type) to avoid errors.

[Oct 3 2015]

FIX: tty_clear was not syncronized FIX: highlighting matched selection was slowed down on large output