QStringLiteral broken for unicode characters

I am trying to do something like this:

QString str = QStringLiteral("Some international text");
QFile file("C:/Some/File");
file.open(QIODevice::WriteOnly);
file.write(str.toUtf8());

I expect the international text to be written UTF-8 encoded. Instead, it gets written in some broken encoding. My source files are UTF-8 without BOM, though I am using the "/utf-8" MSVC command line switch, so the absence of BOM shouldn't matter.

Looking at the implementation of QStringLiteral, the problem seems to be the following:

#define QT_UNICODE_LITERAL(str) u"" str

Changing it to look like this seems to fix the problem.

#define QT_UNICODE_LITERAL(str) u ## str