How can you demangle QStringList in Qt6, so it does not convert to "QList<QString>"?

Question

I have been using this function for quite some time in Qt5:

static QString demangle( const QString &name )
{
    int status;
    std::unique_ptr< char, void(*)( void* ) > res (
        abi::__cxa_demangle( name.toLatin1(), nullptr, nullptr, &status ), std::free );
    return { ( status == 0 ) ? QLatin1String( res.get() ) : name };
}

Since starting to use Qt6,

ct_Halt( demangle(typeid (QStringList).name() ), demangle(typeid (QList<QString>).name() ) );

now produces

QString demangle(typeid (QStringList).name() )
"QList<QString>" // This used to produce QStringList in Qt5

QString demangle(typeid (QList<QString>).name() )
"QList<QString>"

This little annoyance has broken a library that I created. Its not a big deal but I'd like to know if the demangle function can be "fixed" to accurately reflect the typename.