Qt 5.7.0 QSettings fails to save QVariantHash on macOS Sierra

#include <QSettings>
#include <QVariant>
#include <QHash>
#include <QDebug>

int main()
{
    QSettings pref("foo", "bar");
    QVariantHash hash;
    hash["one"] = 1;
    hash["three"] = "tres";
    hash["seven"] = 7;
    pref.setValue("baz", hash);

    hash = pref.value("baz").toHash();
    QVariantHash::const_iterator it = hash.begin();
    QVariantHash::const_iterator end = hash.end();
    for(; it != end; ++it) {
        qDebug() << it.key() << it.value();
    }

    return 0;
}

$ plutil -convert xml1 ~/Library/Preferences/com.foo.bar.plist 
$ cat ~/Library/Preferences/com.foo.bar.plist 
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>baz</key>
	<string>@Variant(</string>
</dict>
</plist>