# Ann: SWI-Prolog 9.2.4 (stable) **URL:** \ **Category:** Releases\ **Created:** [April 26, 2024, 4:23pm UTC](https://swi-prolog.discourse.group/t/ann-swi-prolog-9-2-4-stable/7407 "2024-04-26T16:23:14Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![jan](https://yyz2.discourse-cdn.com/free1/user_avatar/swi-prolog.discourse.group/jan/32/4_2.png) [@jan](https://swi-prolog.discourse.group/u/jan)\ **Post date:** [April 26, 2024, 4:23pm UTC](https://swi-prolog.discourse.group/t/ann-swi-prolog-9-2-4-stable/7407/1 "2024-04-26T16:23:14Z")
Dear SWI-Prolog user, SWI-Prolog 9.2.4 (stable) is ready for download. This mostly fixes some bugs. See below. The `library(http/http_load)`, which allows compile directly from HTTP(s) URLs now by default verifies the certificate. This is a MODIFIED, but could just as well be interpreted as SECURITY. ``` Enjoy --- Jan ``` # SWI-Prolog Changelog since version 9.2.3 - PORT: Fix case conversion for Unicode characters on Windows. - FIXED: prolog\_walk\_code/1: no matching rule from goals reached from a :- initialization. - PORT: Include Ubuntu 24.04 (Noble Nombat) in PPA builds - PORT: Use -funwind-tables on ARM systems with glibc, also for clang - PORT: Deal with Android `android-execinfo` library. - FIXED: generation of swipl.pc pkg-config file Now uses LIBSWIPL\_DIR to get the correct -L flag when the system is installed as global library. - FIXED: Reconsult when the loaded code sets the `trace` flag on a predicate. This was due to a conflict over the predicate flags. As the `flags` field was widened, we can avoid these problems. - FIXED: WASM: fix fid arg position in this.query call in \_\_call\_yieldable - FIXED: #1262 upcase\_atom/2 and friends on ISO → wide If input is ISO-Latin-1 and the converted character requires wide characters the system trapped an assertion error. Now correctly converts to wide characters. - FIXED: Clang handling of `max_integer_size` Clang cannot handle setjmp()/longjmp in PL\_next\_solution(), but it can in the simple evalExpression() function. This does not have measurable impact on performance, so we enabled this as default. This fixes limiting the integer size for WASM and Clang builds on Linux. This problem did not surface on the MacOS version. - FIXED: comparison of MPZ and MPQ with 64 bit integers if long is 4 bytes - FIXED: Normalize LibBF numbers created from 64 bit integers on VS2022 VS2022 does not support 128-bit integers and therefore we must use 32-bit “limbs” - COMPAT: Introduce abstract types for PL\_new\_hash\_table() and friends Rather than hard coded `void*` we now use `table_key_t` and `table_value_t`. These types are also introduced in the development series, where the type changes. ## Package http - MODIFIED: library(http/http\_load) to verify certificates This library allows for loading files from http/https URLs. It used to skip certificate checking. Checking is now enabled and the Option argument may be used to disable it (using the `cert_verify_hook` option). - FIXED: Undefined predicate schedule\_gc/2 in library(http/http\_session) ## Package sweep - FIXED: workaround Emacs incompatibility with certain locales The Emacs Elisp reader only works with locales that have “.” as their decimal separator, but Prolog initialization sets up the locale according to the environment variables. Therefore we need to reset the locale after initializing Prolog in case the environment prescribes a locale with a different decimal separator, such as fr\_FR. See also [loading sweep trashes emacs hashtable management · Issue #1 · SWI-Prolog/packages-sweep · GitHub](https://github.com/SWI-Prolog/packages-sweep/issues/1) ## Package swipy - DOC: janus.query() etc optional arguments is called `inputs` - FIXED: Memory leak when generating a Prolog dict from a Python dict - FIXED: Wrong Python refcount update. Reported by Jerry James as !8. That is is not entirely correct though.