Merge branch 'stable-5.6'

Author: james-d-mitchell

.LIBSEMIGROUPS_VERSION

@@ -1 +1 @@
-3.4.0
+3.5.3

.VERSION

@@ -1 +1 @@
-5.6.0
+5.6.1

.github/workflows/release-pkg.yml

@@ -31,7 +31,7 @@ jobs:
           use-latex: true
       - name: "Clean up additional files"
         run: |
-          rm -f  .mailmap .codespellrc .clang-format .release
+          rm -f  .mailmap .codespellrc .clang-format
           rm -rf etc ci tst/github_actions
       - name: "Run prerequisites.sh to install libsemigroups"
         run: ./prerequisites.sh

.release

@@ -4,6 +4,15 @@ Copyright © 2011-2026 [James D. Mitchell][] et al.
 
 Licensing information can be found in the `LICENSE` file.
 
+## Version 5.6.1 (released 18/03/2026)
+
+This is a minor release to fix some issues with the release archive for v5.6.0,
+and to fix a memory leak caused by raising errors in GAP from caught C++
+exceptons:
+
+- Fix GAPBIND14_TRY memory leak by @Joseph-Edwards in
+  https://github.com/semigroups/Semigroups/pull/1145
+
 ## Version 5.6.0 (released 05/03/2026)
 
 There are a bunch of fixes and improvements in this version. The most major new

CHANGELOG.md

@@ -1,7 +1,7 @@
 ############################################################################
 ##
 ##  PackageInfo.g
-##  Copyright (C) 2011-2025                              James D. Mitchell
+##  Copyright (C) 2011-2026                              James D. Mitchell
 ##
 ##  Licensing information can be found in the README file of this package.
 ##
@@ -34,8 +34,8 @@ _STANDREWSCS := Concatenation(["Jack Cole Building, North Haugh, ",
 SetPackageInfo(rec(
 PackageName := "Semigroups",
 Subtitle := "A package for semigroups and monoids",
-Version := "5.6.0",
-Date := "05/03/2026",  # dd/mm/yyyy format
+Version := "5.6.1",
+Date := "18/03/2026",  # dd/mm/yyyy format
 License := "GPL-3.0-or-later",
 
 ArchiveFormats := ".tar.gz",

PackageInfo.g

@@ -9,6 +9,7 @@
 ##
 ##
 
+release 5.6.1  - 18/03/2026
 release 5.6.0  - 05/03/2026
 release 5.5.4  - 29/08/2025
 release 5.5.3  - 17/07/2025

VERSIONS

@@ -43,12 +43,12 @@ AC_DEFUN([CHECK_COMPILER_BUILTIN],
     AC_MSG_RESULT(AS_VAR_GET([[have_]$1]))
     AS_IF([test yes = AS_VAR_GET([[have_]$1])],
         [AC_DEFINE_UNQUOTED(AS_TR_CPP([HAVE_]$1), 1,
-            [Define to 1 if the system has the `]$1[' built-in function])], []
+            [Define to 1 if the system has the `]$1[' built-in function])],
+            [AC_MSG_ERROR([`]$1[' is required, giving up.])]
         )])
 
 CHECK_COMPILER_BUILTIN([__builtin_unreachable],[]);
 
-
 dnl ##
 dnl ## Locate the GAP root dir
 dnl ##

configure.ac

@@ -4,4 +4,4 @@ channels:
   - conda-forge
 
 dependencies:
-  - libsemigroups==3.4.0
+  - libsemigroups==3.5.3

environment.yml

@@ -24,8 +24,7 @@
 #include <tuple>        // for tuple, tuple_element_t
 #include <type_traits>  // for true_type
 
-#include "../../../src/semigroups-config.hpp"  // for SEMIGRUOPS_HAVE___BUILTIN_UNREACHABLE
-#include "gap_include.hpp"                     // for UInt
+#include "gap_include.hpp"  // for UInt
 
 namespace gapbind14::detail {
   // Inspired by the possible implementation of std::unreachable (C++23)
@@ -36,7 +35,7 @@ namespace gapbind14::detail {
     // an empty function body and the noreturn attribute.
 #if defined(_MSC_VER) && !defined(__clang__)  // MSVC
     __assume(false);
-#elif defined(SEMIGROUPS_HAVE___BUILTIN_UNREACHABLE)
+#else
     __builtin_unreachable();
 #endif
   }