qmimeprovider.cpp:649:18: error: invalid conversion

[jschueller]

qt 5.15.0 tarball compilation fails with this error message (linux/gcc 8):

mimetypes/qmimeprovider.cpp: In constructor 'QMimeXMLProvider::QMimeXMLProvider(QMimeDatabasePrivate*, QMimeXMLProvider::InternalDatabaseEnum)':
mimetypes/qmimeprovider.cpp:649:18: error: invalid conversion from 'const unsigned char*' to 'Bytef*' {aka 'unsigned char*'} [-fpermissive]
     zs.next_in = mimetype_database;
                  ^~~~~~~~~~~~~~~~~
moc time/qcalendar.h
moc io/qfile.h
moc io/qbuffer.h
moc io/qfiledevice.h
moc io/qiodevice.h
moc io/qnoncontiguousbytedevice_p.h
moc io/qsavefile.h
moc io/qtemporaryfile.h
moc io/qstandardpaths.h
moc io/qfileselector.h
make[3]: *** [.obj/qmimeprovider.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory `/usr/local/src/qt-everywhere-src-5.15.0/qtbase/src/corelib'
make[2]: Leaving directory `/usr/local/src/qt-everywhere-src-5.15.0/qtbase/src'
make[2]: *** [sub-corelib-make_first] Error 2
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory `/usr/local/src/qt-everywhere-src-5.15.0/qtbase'
make: *** [module-qtbase-make_first] Error 2

[jschueller]

https://bugreports.qt.io/projects/QTBUG/issues/QTBUG-84457

[dxli]

While it should work, I'm wondering whether it's better to avoid casting here.

Something like:

QString mimetypeDatabase{mimetype_database};
zs.next_in = mimetypeDatabase.data();