qmimeprovider_p.h: compilation error with GCC 7

/usr/local/bin/g++ -c -include .pch/Qt5Core -pipe -pthread -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -O3 -std=c++1z -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -D_REENTRANT -fPIC -DQT_NO_TSLIB -DQT_NO_USING_NAMESPACE -DELF_INTERPRETER=\"/lib64/ld-linux-x86-64.so.2\" -DQT_USE_ICU -DQT_BUILD_CORE_LIB -DQT_BUILDING_QT -DQT_NO_CAST_TO_ASCII -DQT_ASCII_CAST_WARNINGS -DQT_MOC_COMPAT -DQT_USE_QSTRINGBUILDER -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -I. -Iglobal -I../3rdparty/harfbuzz/src -I../3rdparty/md5 -I../3rdparty/md4 -I../3rdparty/sha3 -I../3rdparty/forkfd -I../../include -I../../include/QtCore -I../../include/QtCore/5.6.2 -I../../include/QtCore/5.6.2/QtCore -I.moc -I../../mkspecs/linux-g++ -o .obj/qmimeprovider.o mimetypes/qmimeprovider.cpp
In file included from ../../include/QtCore/qtypeinfo.h:1:0,
                 from global/qglobal.h:1104,
                 from global/qt_pch.h:50:
../../include/QtCore/../../src/corelib/global/qtypeinfo.h: In instantiation of 'class QTypeInfo<QMimeMagicRuleMatcher>':
../../include/QtCore/../../src/corelib/tools/qlist.h:483:31:   required from 'void QList<T>::node_destruct(QList<T>::Node*, QList<T>::Node*) [with T = QMimeMagicRuleMatcher]'
../../include/QtCore/../../src/corelib/tools/qlist.h:855:18:   required from 'void QList<T>::dealloc(QListData::Data*) [with T = QMimeMagicRuleMatcher]'
../../include/QtCore/../../src/corelib/tools/qlist.h:817:16:   required from 'QList<T>::~QList() [with T = QMimeMagicRuleMatcher]'
mimetypes/qmimeprovider_p.h:131:7:   required from here
../../include/QtCore/../../src/corelib/global/qtypeinfo.h:60:26: error: invalid application of 'sizeof' to incomplete type 'QMimeMagicRuleMatcher'
         isLarge = (sizeof(T)>sizeof(void*)),
                          ^
../../include/QtCore/../../src/corelib/global/qtypeinfo.h:62:24: error: invalid application of 'sizeof' to incomplete type 'QMimeMagicRuleMatcher'
         sizeOf = sizeof(T)
                        ^
In file included from ../../include/QtCore/qlist.h:1:0,
                 from ../../include/QtCore/../../src/corelib/kernel/qobject.h:43,
                 from ../../include/QtCore/qobject.h:1,
                 from ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:40,
                 from ../../include/QtCore/qcoreapplication.h:1,
                 from global/qt_pch.h:56:
../../include/QtCore/../../src/corelib/tools/qlist.h: In instantiation of 'void QList<T>::node_destruct(QList<T>::Node*, QList<T>::Node*) [with T = QMimeMagicRuleMatcher]':
../../include/QtCore/../../src/corelib/tools/qlist.h:855:18:   required from 'void QList<T>::dealloc(QListData::Data*) [with T = QMimeMagicRuleMatcher]'
../../include/QtCore/../../src/corelib/tools/qlist.h:817:16:   required from 'QList<T>::~QList() [with T = QMimeMagicRuleMatcher]'
mimetypes/qmimeprovider_p.h:131:7:   required from here
../../include/QtCore/../../src/corelib/tools/qlist.h:484:31: warning: possible problem detected in invocation of delete operator: [-Wdelete-incomplete]
         while(from != to) --to, delete reinterpret_cast<T*>(to->v);
../../include/QtCore/../../src/corelib/tools/qlist.h:484:65: warning: invalid use of incomplete type 'class QMimeMagicRuleMatcher'
         while(from != to) --to, delete reinterpret_cast<T*>(to->v);
                                                             ~~~~^
In file included from mimetypes/qmimedatabase.cpp:42:0:
mimetypes/qmimeprovider_p.h:59:7: note: forward declaration of 'class QMimeMagicRuleMatcher'
 class QMimeMagicRuleMatcher;
       ^~~~~~~~~~~~~~~~~~~~~
In file included from ../../include/QtCore/qlist.h:1:0,
                 from ../../include/QtCore/../../src/corelib/kernel/qobject.h:43,
                 from ../../include/QtCore/qobject.h:1,
                 from ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:40,
                 from ../../include/QtCore/qcoreapplication.h:1,
                 from global/qt_pch.h:56:
../../include/QtCore/../../src/corelib/tools/qlist.h:484:31: note: neither the destructor nor the class-specific operator delete will be called, even if they are declared when the class is defined
         while(from != to) --to, delete reinterpret_cast<T*>(to->v);
../../include/QtCore/../../src/corelib/tools/qlist.h:486:61: error: invalid use of incomplete type 'class QMimeMagicRuleMatcher'
         while (from != to) --to, reinterpret_cast<T*>(to)->~T();
                                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~^
In file included from mimetypes/qmimedatabase.cpp:42:0:
mimetypes/qmimeprovider_p.h:59:7: note: forward declaration of 'class QMimeMagicRuleMatcher'
 class QMimeMagicRuleMatcher;
       ^~~~~~~~~~~~~~~~~~~~~