dev-libs/libxml2: fix memory leak (and test failure)

The memory leak shows up as test failure w/ USE=python.

Closes: https://bugs.gentoo.org/971193
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/libxml2/files/libxml2-2.15.2-memory-leak-python.patch

@@ -0,0 +1,31 @@
+https://bugs.gentoo.org/971193
+https://gitlab.gnome.org/GNOME/libxml2/-/issues/1069
+https://gitlab.gnome.org/GNOME/libxml2/-/commit/fac4411aa65a2ebf936be50856ab14c148966e9d
+
+From fac4411aa65a2ebf936be50856ab14c148966e9d Mon Sep 17 00:00:00 2001
+From: "Jan Alexander Steffens (heftig)" <heftig@archlinux.org>
+Date: Wed, 4 Mar 2026 19:08:16 +0100
+Subject: [PATCH] catalog: Free xmlCatalogResolveCache on cleanup
+
+Otherwise the `tstLastError.py` test will complain about a memory leak.
+
+Fixes: b706c5c5b7ce11d002a5b77ff938aa3693931c12 (Add xmlCatalogResolveCache)
+Fixes: https://gitlab.gnome.org/GNOME/libxml2/-/issues/1069
+---
+ catalog.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/catalog.c b/catalog.c
+index 263268c08..ff97adedf 100644
+--- a/catalog.c
++++ b/catalog.c
+@@ -3338,6 +3338,7 @@ xmlCatalogCleanup(void) {
+     if (xmlDebugCatalogs)
+ 	xmlCatalogPrintDebug(
+ 		"Catalogs cleanup\n");
++    xmlResetCatalogResolveCache();
+     if (xmlCatalogXMLFiles != NULL)
+ 	xmlHashFree(xmlCatalogXMLFiles, xmlFreeCatalogHashEntryList);
+     xmlCatalogXMLFiles = NULL;
+-- 
+GitLab

dev-libs/libxml2/libxml2-2.15.2-r1.ebuild

@@ -0,0 +1,166 @@
+# Copyright 1999-2026 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Note: Please bump in sync with dev-libs/libxslt
+
+PYTHON_COMPAT=( python3_{11..14} )
+PYTHON_REQ_USE="xml(+)"
+inherit python-r1 meson-multilib
+
+DESCRIPTION="XML C parser and toolkit"
+HOMEPAGE="https://gitlab.gnome.org/GNOME/libxml2/-/wikis/home"
+if [[ ${PV} == 9999 ]] ; then
+	EGIT_REPO_URI="https://gitlab.gnome.org/GNOME/libxml2"
+	inherit git-r3
+else
+	inherit gnome.org
+	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~arm64-macos ~x64-macos ~x64-solaris"
+fi
+
+S="${WORKDIR}/${PN}-${PV%_rc*}"
+
+LICENSE="MIT"
+# see so_version = v_maj + v_min_compat for subslot
+SLOT="2/16"
+IUSE="doc icu python readline static-libs test"
+RESTRICT="!test? ( test )"
+REQUIRED_USE="python? ( ${PYTHON_REQUIRED_USE} )"
+
+RDEPEND="
+	virtual/libiconv
+	>=virtual/zlib-1.2.8-r1:=[${MULTILIB_USEDEP}]
+	icu? ( >=dev-libs/icu-51.2-r1:=[${MULTILIB_USEDEP}] )
+	python? ( ${PYTHON_DEPS} )
+	readline? ( sys-libs/readline:= )
+"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	virtual/pkgconfig
+	doc? (
+		app-text/docbook-xsl-stylesheets
+		app-text/doxygen
+		dev-libs/libxslt
+	)
+	python? ( app-text/doxygen )
+"
+
+MULTILIB_CHOST_TOOLS=(
+	/usr/bin/xml2-config
+)
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-2.14.2-no-git.patch
+	"${FILESDIR}"/${P}-memory-leak-python.patch
+)
+
+src_unpack() {
+	if [[ ${PV} == 9999 ]] ; then
+		git-r3_src_unpack
+	else
+		default
+	fi
+
+	cd "${S}" || die
+}
+
+src_prepare() {
+	default
+
+	sed -e "/^dir_doc/ s/meson.project_name()$/\'${PF}\'/" -i meson.build || die
+}
+
+python_configure() {
+	local emesonargs=(
+		$(meson_feature icu)
+		$(meson_native_use_feature readline)
+		$(meson_native_use_feature readline history)
+		-Ddocs=disabled
+		-Dpython=enabled
+		-Dschematron=enabled
+	)
+	mkdir "${BUILD_DIR}" || die
+	pushd "${BUILD_DIR}" >/dev/null || die
+	meson_src_configure
+	popd >/dev/null || die
+}
+
+multilib_src_configure() {
+	local emesonargs=(
+		-Ddefault_library=$(multilib_native_usex static-libs both shared)
+		$(meson_feature icu)
+		$(meson_native_use_feature doc docs)
+		$(meson_native_use_feature readline)
+		$(meson_native_use_feature readline history)
+		-Dpython=disabled
+		-Dschematron=enabled
+
+		# There has been a clean break with a soname bump.
+		# It's time to deal with the breakage.
+		# bug #935452
+		-Dlegacy=disabled
+	)
+	meson_src_configure
+
+	if multilib_is_native_abi && use python ; then
+		python_foreach_impl python_configure
+	fi
+}
+
+python_compile() {
+	pushd "${BUILD_DIR}" >/dev/null || die
+	meson_src_compile
+	popd >/dev/null || die
+}
+
+multilib_src_compile() {
+	meson_src_compile
+
+	if multilib_is_native_abi && use python ; then
+		python_foreach_impl python_compile
+	fi
+}
+
+multilib_src_test() {
+	meson_src_test
+
+	if multilib_is_native_abi && use python ; then
+		python_foreach_impl meson_src_test
+	fi
+}
+
+python_install() {
+	pushd "${BUILD_DIR}" >/dev/null || die
+	meson_src_install
+	python_optimize
+	popd >/dev/null || die
+}
+
+multilib_src_install() {
+	if multilib_is_native_abi && use python ; then
+		python_foreach_impl python_install
+	fi
+
+	meson_src_install
+}
+
+pkg_postinst() {
+	# We don't want to do the xmlcatalog during stage1, as xmlcatalog will not
+	# be in / and stage1 builds to ROOT=/tmp/stage1root. This fixes bug #208887.
+	if [[ -n "${ROOT}" ]]; then
+		elog "Skipping XML catalog creation for stage building (bug #208887)."
+	else
+		# Need an XML catalog, so no-one writes to a non-existent one
+		CATALOG="${EROOT}/etc/xml/catalog"
+
+		# We don't want to clobber an existing catalog though,
+		# only ensure that one is there
+		# <obz@gentoo.org>
+		if [[ ! -e "${CATALOG}" ]]; then
+			[[ -d "${EROOT}/etc/xml" ]] || mkdir -p "${EROOT}/etc/xml"
+			"${EPREFIX}"/usr/bin/xmlcatalog --create > "${CATALOG}"
+			einfo "Created XML catalog in ${CATALOG}"
+		fi
+	fi
+}