QStringView not exported

QStringView is declared like this (qstringview.h, line 104):

class QStringView

That is, Q_CORE_EXPORT is missing which makes the functions of the class unexported and therefore unlinkable on windows. Code as simple as:

class QString (*_6807)(const class QString&) = &QRegularExpression::anchoredPattern;

fails to link with LLD as a library. Strangely enough, Qt Creator manages to build it when it obviously shouldn't. Do I need to use any special settings which Creator does internally?