qurlrecode memcpy triggering a fatal warning

[34/14293] Building CXX object qtbase/src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/io/qurlrecode.cpp.o
/home/rutledge/dev/qt6/qtbase/src/corelib/io/qurlrecode.cpp: In function ‘qsizetype decode(QString&, QStringView)’:
/home/rutledge/dev/qt6/qtbase/src/corelib/io/qurlrecode.cpp:594:11: warning: ‘void* memcpy(void*, const void*, size_t)’ copying an object of non-trivial type ‘class QChar’ from an array of ‘const char16_t’ [-Wclass-memaccess]
  594 |     memcpy(output, begin, (input - begin) * sizeof(QChar));
      |     ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/qchar.h:1,
                 from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/../../../../qt6/qtbase/src/corelib/text/qstring.h:50,
                 from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/qstring.h:1,
                 from /home/rutledge/dev/qt6/qtbase/src/corelib/io/qurl.h:46,
                 from /home/rutledge/dev/qt6/qtbase/src/corelib/io/qurlrecode.cpp:40:
/home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/../../../../qt6/qtbase/src/corelib/text/qchar.h:84:21: note: ‘class QChar’ declared here
   84 | class Q_CORE_EXPORT QChar {
      |                     ^~~~~
/home/rutledge/dev/qt6/qtbase/src/corelib/io/qurlrecode.cpp:604:19: warning: ‘void* memcpy(void*, const void*, size_t)’ copying an object of non-trivial type ‘class QChar’ from an array of ‘const char16_t’ [-Wclass-memaccess]
  604 |             memcpy(appendTo.begin() + origSize, begin, (end - begin) * sizeof(*end));
      |             ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/qchar.h:1,
                 from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/../../../../qt6/qtbase/src/corelib/text/qstring.h:50,
                 from /home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/qstring.h:1,
                 from /home/rutledge/dev/qt6/qtbase/src/corelib/io/qurl.h:46,
                 from /home/rutledge/dev/qt6/qtbase/src/corelib/io/qurlrecode.cpp:40:
/home/rutledge/dev/qt6-dbg/qtbase/include/QtCore/../../../../qt6/qtbase/src/corelib/text/qchar.h:84:21: note: ‘class QChar’ declared here
   84 | class Q_CORE_EXPORT QChar {
      |                     ^~~~~
[900/14293] Building CXX object qtbase/src/corelib/CMakeFiles/Core.dir/io/qurlrecode.cpp.o
FAILED: qtbase/src/corelib/CMakeFiles/Core.dir/io/qurlrecode.cpp.o 

    const char16_t *begin = in.utf16();
    const char16_t *end = begin + in.size();

    // fast check whether there's anything to be decoded in the first place
    const char16_t *input = QtPrivate::qustrchr(in, '%');

    if (Q_LIKELY(input == end))
        return 0;           // nothing to do, it was already decoded!

    // detach
    const int origSize = appendTo.size();
    appendTo.resize(origSize + (end - begin));
    QChar *output = appendTo.data() + origSize;
    memcpy(output, begin, (input - begin) * sizeof(QChar));