[arch-commits] Commit in qt5-base/repos/kde-unstable-x86_64 (6 files)
Antonio Rojas
arojas at archlinux.org
Mon Mar 30 11:51:27 UTC 2020
Date: Monday, March 30, 2020 @ 11:51:26
Author: arojas
Revision: 378726
archrelease: copy kde-unstable to kde-unstable-x86_64
Added:
qt5-base/repos/kde-unstable-x86_64/PKGBUILD
(from rev 378725, qt5-base/kde-unstable/PKGBUILD)
qt5-base/repos/kde-unstable-x86_64/qt5-base-cflags.patch
(from rev 378725, qt5-base/kde-unstable/qt5-base-cflags.patch)
qt5-base/repos/kde-unstable-x86_64/qtbug-82700.patch
(from rev 378725, qt5-base/kde-unstable/qtbug-82700.patch)
Deleted:
qt5-base/repos/kde-unstable-x86_64/PKGBUILD
qt5-base/repos/kde-unstable-x86_64/qt5-base-cflags.patch
qt5-base/repos/kde-unstable-x86_64/qtbug-82700.patch
-----------------------+
PKGBUILD | 206 ++++++++++++++++++++++++------------------------
qt5-base-cflags.patch | 72 ++++++++++------
qtbug-82700.patch | 144 ++++++++++++++++-----------------
3 files changed, 221 insertions(+), 201 deletions(-)
Deleted: PKGBUILD
===================================================================
--- PKGBUILD 2020-03-30 11:51:01 UTC (rev 378725)
+++ PKGBUILD 2020-03-30 11:51:26 UTC (rev 378726)
@@ -1,103 +0,0 @@
-# Maintainer: Felix Yan <felixonmars at archlinux.org>
-# Contributor: Andrea Scarpino <andrea at archlinux.org>
-
-pkgbase=qt5-base
-pkgname=(qt5-base qt5-xcb-private-headers)
-_qtver=5.15.0-beta2
-pkgver=${_qtver/-/}
-pkgrel=1
-arch=('x86_64')
-url='https://www.qt.io'
-license=('GPL3' 'LGPL3' 'FDL' 'custom')
-pkgdesc='A cross-platform application and UI framework'
-depends=('libjpeg-turbo' 'xcb-util-keysyms' 'xcb-util-renderutil' 'libgl' 'fontconfig' 'xdg-utils'
- 'shared-mime-info' 'xcb-util-wm' 'libxrender' 'libxi' 'sqlite' 'xcb-util-image' 'mesa'
- 'tslib' 'libinput' 'libxkbcommon-x11' 'libproxy' 'libcups' 'double-conversion' 'md4c')
-makedepends=('libfbclient' 'mariadb-libs' 'sqlite' 'unixodbc' 'postgresql-libs' 'alsa-lib' 'gst-plugins-base-libs'
- 'gtk3' 'libpulse' 'cups' 'freetds' 'vulkan-headers')
-optdepends=('qt5-svg: to use SVG icon themes'
- 'qt5-wayland: to run Qt applications in a Wayland session'
- 'qt5-translations: for some native UI translations'
- 'postgresql-libs: PostgreSQL driver'
- 'mariadb-libs: MariaDB driver'
- 'unixodbc: ODBC driver'
- 'libfbclient: Firebird/iBase driver'
- 'freetds: MS SQL driver'
- 'gtk3: GTK platform plugin'
- 'perl: for fixqt4headers and syncqt')
-conflicts=('qtchooser')
-groups=('qt' 'qt5')
-_pkgfqn="${pkgbase/5-/}-everywhere-src-${_qtver}"
-source=("https://download.qt.io/development_releases/qt/${pkgver%.*}/${_qtver}/submodules/${_pkgfqn}.tar.xz"
- qt5-base-cflags.patch
- qtbug-82700.patch)
-sha256sums=('4b07983d9b8ae611bbb65388beea0629990080b99813788e4e7db56cb7897677'
- 'c70640499637314df68cc7a56519f0bf8b65dd808dd982c96c6f045bba993adf'
- '38c28c63e86dbae8d27db38d274bb9b5f4d2702feab9023f86d50555c84a96af')
-
-prepare() {
- cd ${_pkgfqn}
-
- patch -p1 -i ../qt5-base-cflags.patch # Use system CFLAGS
- patch -p1 -i ../qtbug-82700.patch # Fix binary incompatible change in QJsonObject and QJsonArray
-}
-
-build() {
- cd ${_pkgfqn}
-
- ./configure -confirm-license -opensource -v \
- -prefix /usr \
- -docdir /usr/share/doc/qt \
- -headerdir /usr/include/qt \
- -archdatadir /usr/lib/qt \
- -datadir /usr/share/qt \
- -sysconfdir /etc/xdg \
- -examplesdir /usr/share/doc/qt/examples \
- -plugin-sql-{psql,mysql,sqlite,odbc,ibase} \
- -system-sqlite \
- -openssl-linked \
- -nomake examples \
- -no-rpath \
- -dbus-linked \
- -system-harfbuzz \
- -journald \
- -no-mimetype-database \
- -no-use-gold-linker \
- -reduce-relocations
- make
-}
-
-package_qt5-base() {
- pkgdesc='A cross-platform application and UI framework'
-
- cd ${_pkgfqn}
- make INSTALL_ROOT="${pkgdir}" install
-
- install -Dm644 LICENSE* -t "$pkgdir"/usr/share/licenses/$pkgbase
-
- # Drop QMAKE_PRL_BUILD_DIR because reference the build dir
- find "${pkgdir}/usr/lib" -type f -name '*.prl' \
- -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;
-
- # Fix wrong qmake path in pri file
- sed -i "s|${srcdir}/${_pkgfqn}|/usr|" \
- "${pkgdir}"/usr/lib/qt/mkspecs/modules/qt_lib_bootstrap_private.pri
-
- # Symlinks for backwards compatibility
- for b in "${pkgdir}"/usr/bin/*; do
- ln -s $(basename $b) "${pkgdir}"/usr/bin/$(basename $b)-qt5
- done
-}
-
-package_qt5-xcb-private-headers() {
- pkgdesc='Private headers for Qt5 Xcb'
-
- depends=("qt5-base=$pkgver")
- optdepends=()
- groups=()
- conflicts=()
-
- cd ${_pkgfqn}
- install -d -m755 "$pkgdir"/usr/include/qtxcb-private
- cp -r src/plugins/platforms/xcb/*.h "$pkgdir"/usr/include/qtxcb-private/
-}
Copied: qt5-base/repos/kde-unstable-x86_64/PKGBUILD (from rev 378725, qt5-base/kde-unstable/PKGBUILD)
===================================================================
--- PKGBUILD (rev 0)
+++ PKGBUILD 2020-03-30 11:51:26 UTC (rev 378726)
@@ -0,0 +1,103 @@
+# Maintainer: Felix Yan <felixonmars at archlinux.org>
+# Contributor: Andrea Scarpino <andrea at archlinux.org>
+
+pkgbase=qt5-base
+pkgname=(qt5-base qt5-xcb-private-headers)
+_qtver=5.15.0-beta2
+pkgver=${_qtver/-/}
+pkgrel=2
+arch=('x86_64')
+url='https://www.qt.io'
+license=('GPL3' 'LGPL3' 'FDL' 'custom')
+pkgdesc='A cross-platform application and UI framework'
+depends=('libjpeg-turbo' 'xcb-util-keysyms' 'xcb-util-renderutil' 'libgl' 'fontconfig' 'xdg-utils'
+ 'shared-mime-info' 'xcb-util-wm' 'libxrender' 'libxi' 'sqlite' 'xcb-util-image' 'mesa'
+ 'tslib' 'libinput' 'libxkbcommon-x11' 'libproxy' 'libcups' 'double-conversion' 'md4c')
+makedepends=('libfbclient' 'mariadb-libs' 'sqlite' 'unixodbc' 'postgresql-libs' 'alsa-lib' 'gst-plugins-base-libs'
+ 'gtk3' 'libpulse' 'cups' 'freetds' 'vulkan-headers')
+optdepends=('qt5-svg: to use SVG icon themes'
+ 'qt5-wayland: to run Qt applications in a Wayland session'
+ 'qt5-translations: for some native UI translations'
+ 'postgresql-libs: PostgreSQL driver'
+ 'mariadb-libs: MariaDB driver'
+ 'unixodbc: ODBC driver'
+ 'libfbclient: Firebird/iBase driver'
+ 'freetds: MS SQL driver'
+ 'gtk3: GTK platform plugin'
+ 'perl: for fixqt4headers and syncqt')
+conflicts=('qtchooser')
+groups=('qt' 'qt5')
+_pkgfqn="${pkgbase/5-/}-everywhere-src-${_qtver}"
+source=("https://download.qt.io/development_releases/qt/${pkgver%.*}/${_qtver}/submodules/${_pkgfqn}.tar.xz"
+ qt5-base-cflags.patch
+ qtbug-82700.patch)
+sha256sums=('4b07983d9b8ae611bbb65388beea0629990080b99813788e4e7db56cb7897677'
+ 'cf707cd970650f8b60f8897692b36708ded9ba116723ec8fcd885576783fe85c'
+ '38c28c63e86dbae8d27db38d274bb9b5f4d2702feab9023f86d50555c84a96af')
+
+prepare() {
+ cd ${_pkgfqn}
+
+ patch -p1 -i ../qt5-base-cflags.patch # Use system CFLAGS
+ patch -p1 -i ../qtbug-82700.patch # Fix binary incompatible change in QJsonObject and QJsonArray
+}
+
+build() {
+ cd ${_pkgfqn}
+
+ ./configure -confirm-license -opensource -v \
+ -prefix /usr \
+ -docdir /usr/share/doc/qt \
+ -headerdir /usr/include/qt \
+ -archdatadir /usr/lib/qt \
+ -datadir /usr/share/qt \
+ -sysconfdir /etc/xdg \
+ -examplesdir /usr/share/doc/qt/examples \
+ -plugin-sql-{psql,mysql,sqlite,odbc,ibase} \
+ -system-sqlite \
+ -openssl-linked \
+ -nomake examples \
+ -no-rpath \
+ -dbus-linked \
+ -system-harfbuzz \
+ -journald \
+ -no-mimetype-database \
+ -no-use-gold-linker \
+ -reduce-relocations
+ make
+}
+
+package_qt5-base() {
+ pkgdesc='A cross-platform application and UI framework'
+
+ cd ${_pkgfqn}
+ make INSTALL_ROOT="${pkgdir}" install
+
+ install -Dm644 LICENSE* -t "$pkgdir"/usr/share/licenses/$pkgbase
+
+ # Drop QMAKE_PRL_BUILD_DIR because reference the build dir
+ find "${pkgdir}/usr/lib" -type f -name '*.prl' \
+ -exec sed -i -e '/^QMAKE_PRL_BUILD_DIR/d' {} \;
+
+ # Fix wrong qmake path in pri file
+ sed -i "s|${srcdir}/${_pkgfqn}|/usr|" \
+ "${pkgdir}"/usr/lib/qt/mkspecs/modules/qt_lib_bootstrap_private.pri
+
+ # Symlinks for backwards compatibility
+ for b in "${pkgdir}"/usr/bin/*; do
+ ln -s $(basename $b) "${pkgdir}"/usr/bin/$(basename $b)-qt5
+ done
+}
+
+package_qt5-xcb-private-headers() {
+ pkgdesc='Private headers for Qt5 Xcb'
+
+ depends=("qt5-base=$pkgver")
+ optdepends=()
+ groups=()
+ conflicts=()
+
+ cd ${_pkgfqn}
+ install -d -m755 "$pkgdir"/usr/include/qtxcb-private
+ cp -r src/plugins/platforms/xcb/*.h "$pkgdir"/usr/include/qtxcb-private/
+}
Deleted: qt5-base-cflags.patch
===================================================================
--- qt5-base-cflags.patch 2020-03-30 11:51:01 UTC (rev 378725)
+++ qt5-base-cflags.patch 2020-03-30 11:51:26 UTC (rev 378726)
@@ -1,26 +0,0 @@
-diff --git a/mkspecs/common/g++-unix.conf b/mkspecs/common/g++-unix.conf
-index a493cd5984..79f2d2fff9 100644
---- a/mkspecs/common/g++-unix.conf
-+++ b/mkspecs/common/g++-unix.conf
-@@ -10,5 +10,5 @@
-
- include(g++-base.conf)
-
--QMAKE_LFLAGS_RELEASE += -Wl,-O1
-+eval(QMAKE_LFLAGS_RELEASE += $$(LDFLAGS))
- QMAKE_LFLAGS_NOUNDEF += -Wl,--no-undefined
-diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf
-index 4d82321cba..4a61fc9d25 100644
---- a/mkspecs/common/gcc-base.conf
-+++ b/mkspecs/common/gcc-base.conf
-@@ -40,8 +40,8 @@ QMAKE_CFLAGS_OPTIMIZE_SIZE = -Os
- QMAKE_CFLAGS_DEPS += -M
- QMAKE_CFLAGS_WARN_ON += -Wall -Wextra
- QMAKE_CFLAGS_WARN_OFF += -w
--QMAKE_CFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE
--QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -g
-+eval(QMAKE_CFLAGS_RELEASE += $$(CFLAGS))
-+eval(QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += -g $$(CFLAGS))
- QMAKE_CFLAGS_DEBUG += -g
- QMAKE_CFLAGS_SHLIB += $$QMAKE_CFLAGS_PIC
- QMAKE_CFLAGS_STATIC_LIB += $$QMAKE_CFLAGS_PIC
Copied: qt5-base/repos/kde-unstable-x86_64/qt5-base-cflags.patch (from rev 378725, qt5-base/kde-unstable/qt5-base-cflags.patch)
===================================================================
--- qt5-base-cflags.patch (rev 0)
+++ qt5-base-cflags.patch 2020-03-30 11:51:26 UTC (rev 378726)
@@ -0,0 +1,46 @@
+diff --git a/mkspecs/common/g++-unix.conf b/mkspecs/common/g++-unix.conf
+index a493cd5984..41342f5020 100644
+--- a/mkspecs/common/g++-unix.conf
++++ b/mkspecs/common/g++-unix.conf
+@@ -10,5 +10,6 @@
+
+ include(g++-base.conf)
+
+-QMAKE_LFLAGS_RELEASE += -Wl,-O1
++SYSTEM_LDFLAGS = $$(LDFLAGS)
++!isEmpty(SYSTEM_LDFLAGS) { eval(QMAKE_LFLAGS_RELEASE += $$(LDFLAGS)) } else { QMAKE_LFLAGS_RELEASE += -Wl,-O1 }
+ QMAKE_LFLAGS_NOUNDEF += -Wl,--no-undefined
+diff --git a/mkspecs/common/gcc-base.conf b/mkspecs/common/gcc-base.conf
+index 1f919d270a..7ef6046326 100644
+--- a/mkspecs/common/gcc-base.conf
++++ b/mkspecs/common/gcc-base.conf
+@@ -40,9 +40,11 @@ QMAKE_CFLAGS_OPTIMIZE_SIZE = -Os
+ QMAKE_CFLAGS_DEPS += -M
+ QMAKE_CFLAGS_WARN_ON += -Wall -Wextra
+ QMAKE_CFLAGS_WARN_OFF += -w
+-QMAKE_CFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE
+-QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -g
+-QMAKE_CFLAGS_DEBUG += -g
++SYSTEM_CFLAGS = $$(CFLAGS)
++SYSTEM_DEBUG_CFLAGS = $$(DEBUG_CFLAGS)
++!isEmpty(SYSTEM_CFLAGS) { eval(QMAKE_CFLAGS_RELEASE += $$(CPPFLAGS) $$(CFLAGS)) } else { QMAKE_CFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE }
++!isEmpty(SYSTEM_CFLAGS) { eval(QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$(CPPFLAGS) -g $$(CFLAGS)) } else { QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -g }
++!isEmpty(SYSTEM_DEBUG_CFLAGS) { eval(QMAKE_CFLAGS_DEBUG += $$(DEBUG_CFLAGS)) } else { QMAKE_CFLAGS_DEBUG += -g }
+ QMAKE_CFLAGS_SHLIB += $$QMAKE_CFLAGS_PIC
+ QMAKE_CFLAGS_STATIC_LIB += $$QMAKE_CFLAGS_PIC
+ QMAKE_CFLAGS_APP += $$QMAKE_CFLAGS_PIC
+@@ -59,9 +61,11 @@ QMAKE_CXXFLAGS += $$QMAKE_CFLAGS
+ QMAKE_CXXFLAGS_DEPS += $$QMAKE_CFLAGS_DEPS
+ QMAKE_CXXFLAGS_WARN_ON += $$QMAKE_CFLAGS_WARN_ON
+ QMAKE_CXXFLAGS_WARN_OFF += $$QMAKE_CFLAGS_WARN_OFF
+-QMAKE_CXXFLAGS_RELEASE += $$QMAKE_CFLAGS_RELEASE
+-QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
+-QMAKE_CXXFLAGS_DEBUG += $$QMAKE_CFLAGS_DEBUG
++SYSTEM_CXXFLAGS = $$(CXXFLAGS)
++SYSTEM_DEBUG_CXXFLAGS = $$(DEBUG_CXXFLAGS)
++!isEmpty(SYSTEM_CXXFLAGS) { eval(QMAKE_CXXFLAGS_RELEASE += $$(CPPFLAGS) $$(CXXFLAGS)) } else { QMAKE_CXXFLAGS_RELEASE += $$QMAKE_CFLAGS_OPTIMIZE }
++!isEmpty(SYSTEM_CXXFLAGS) { eval(QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO += $$(CPPFLAGS) -g $$(CXXFLAGS)) } else { QMAKE_CXXFLAGS_RELEASE_WITH_DEBUGINFO += $$QMAKE_CFLAGS_OPTIMIZE -g }
++!isEmpty(SYSTEM_DEBUG_CXXFLAGS) { eval(QMAKE_CXXFLAGS_DEBUG += $$(DEBUG_CXXFLAGS)) } else { QMAKE_CXXFLAGS_DEBUG += -g }
+ QMAKE_CXXFLAGS_SHLIB += $$QMAKE_CFLAGS_SHLIB
+ QMAKE_CXXFLAGS_STATIC_LIB += $$QMAKE_CFLAGS_STATIC_LIB
+ QMAKE_CXXFLAGS_APP += $$QMAKE_CFLAGS_APP
Deleted: qtbug-82700.patch
===================================================================
--- qtbug-82700.patch 2020-03-30 11:51:01 UTC (rev 378725)
+++ qtbug-82700.patch 2020-03-30 11:51:26 UTC (rev 378726)
@@ -1,72 +0,0 @@
-From 8ac10bea1fac5dad30bf9ff8a1d43eddc271bfb5 Mon Sep 17 00:00:00 2001
-From: Thiago Macieira <thiago.macieira at intel.com>
-Date: Thu, 05 Mar 2020 15:31:38 -0800
-Subject: [PATCH] Fix binary compatibility issue in QJson{Array,Object} initializer_list
-
-The rewrite using CBOR internals replaced one of the two naked pointers
-that were members of QJsonArray and QJsonObject with a
-QExplicitlySharedDataPointer. The problem is that its operator= will
-read the current value to decrement the refcount and possibly delete the
-pointed object.
-
-But QJson{Array,Object}::initialize() are called from inlined code,
-without initialization. So we can't call operator=. We need to memcpy to
-write a nullptr.
-
-This is not unit-testable because it requires compiling against 5.14 or
-earlier, then running against 5.15.
-
-Fixes: QTBUG-82700
-Change-Id: Iaa63461109844e978376fffd15f98c62656d197c
----
-
-diff --git a/src/corelib/serialization/qjsonarray.cpp b/src/corelib/serialization/qjsonarray.cpp
-index 0870277..05138ad 100644
---- a/src/corelib/serialization/qjsonarray.cpp
-+++ b/src/corelib/serialization/qjsonarray.cpp
-@@ -167,7 +167,11 @@
- */
- void QJsonArray::initialize()
- {
-- a = nullptr;
-+ // Because we're being called with uninitialized state, we can't do:
-+ // a = nullptr;
-+ // QExplicitlyDataSharedPointer::operator= will read the current value
-+ void *ptr = &a;
-+ memset(ptr, 0, sizeof(a));
- }
-
- /*!
-@@ -177,7 +181,6 @@
-
- QJsonArray::QJsonArray(std::initializer_list<QJsonValue> args)
- {
-- initialize();
- for (const auto & arg : args)
- append(arg);
- }
-diff --git a/src/corelib/serialization/qjsonobject.cpp b/src/corelib/serialization/qjsonobject.cpp
-index a698727..4f0b5cd 100644
---- a/src/corelib/serialization/qjsonobject.cpp
-+++ b/src/corelib/serialization/qjsonobject.cpp
-@@ -150,7 +150,11 @@
-
- void QJsonObject::initialize()
- {
-- o = nullptr;
-+ // Because we're being called with uninitialized state, we can't do:
-+ // o = nullptr;
-+ // QExplicitlyDataSharedPointer::operator= will read the current value
-+ void *ptr = &o;
-+ memset(ptr, 0, sizeof(o));
- }
-
- /*!
-@@ -160,7 +164,6 @@
-
- QJsonObject::QJsonObject(std::initializer_list<QPair<QString, QJsonValue> > args)
- {
-- initialize();
- for (const auto &arg : args)
- insert(arg.first, arg.second);
- }
Copied: qt5-base/repos/kde-unstable-x86_64/qtbug-82700.patch (from rev 378725, qt5-base/kde-unstable/qtbug-82700.patch)
===================================================================
--- qtbug-82700.patch (rev 0)
+++ qtbug-82700.patch 2020-03-30 11:51:26 UTC (rev 378726)
@@ -0,0 +1,72 @@
+From 8ac10bea1fac5dad30bf9ff8a1d43eddc271bfb5 Mon Sep 17 00:00:00 2001
+From: Thiago Macieira <thiago.macieira at intel.com>
+Date: Thu, 05 Mar 2020 15:31:38 -0800
+Subject: [PATCH] Fix binary compatibility issue in QJson{Array,Object} initializer_list
+
+The rewrite using CBOR internals replaced one of the two naked pointers
+that were members of QJsonArray and QJsonObject with a
+QExplicitlySharedDataPointer. The problem is that its operator= will
+read the current value to decrement the refcount and possibly delete the
+pointed object.
+
+But QJson{Array,Object}::initialize() are called from inlined code,
+without initialization. So we can't call operator=. We need to memcpy to
+write a nullptr.
+
+This is not unit-testable because it requires compiling against 5.14 or
+earlier, then running against 5.15.
+
+Fixes: QTBUG-82700
+Change-Id: Iaa63461109844e978376fffd15f98c62656d197c
+---
+
+diff --git a/src/corelib/serialization/qjsonarray.cpp b/src/corelib/serialization/qjsonarray.cpp
+index 0870277..05138ad 100644
+--- a/src/corelib/serialization/qjsonarray.cpp
++++ b/src/corelib/serialization/qjsonarray.cpp
+@@ -167,7 +167,11 @@
+ */
+ void QJsonArray::initialize()
+ {
+- a = nullptr;
++ // Because we're being called with uninitialized state, we can't do:
++ // a = nullptr;
++ // QExplicitlyDataSharedPointer::operator= will read the current value
++ void *ptr = &a;
++ memset(ptr, 0, sizeof(a));
+ }
+
+ /*!
+@@ -177,7 +181,6 @@
+
+ QJsonArray::QJsonArray(std::initializer_list<QJsonValue> args)
+ {
+- initialize();
+ for (const auto & arg : args)
+ append(arg);
+ }
+diff --git a/src/corelib/serialization/qjsonobject.cpp b/src/corelib/serialization/qjsonobject.cpp
+index a698727..4f0b5cd 100644
+--- a/src/corelib/serialization/qjsonobject.cpp
++++ b/src/corelib/serialization/qjsonobject.cpp
+@@ -150,7 +150,11 @@
+
+ void QJsonObject::initialize()
+ {
+- o = nullptr;
++ // Because we're being called with uninitialized state, we can't do:
++ // o = nullptr;
++ // QExplicitlyDataSharedPointer::operator= will read the current value
++ void *ptr = &o;
++ memset(ptr, 0, sizeof(o));
+ }
+
+ /*!
+@@ -160,7 +164,6 @@
+
+ QJsonObject::QJsonObject(std::initializer_list<QPair<QString, QJsonValue> > args)
+ {
+- initialize();
+ for (const auto &arg : args)
+ insert(arg.first, arg.second);
+ }
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