qt file system classes on windows are wrong in certain circumstances

The following program:
"""
#include <QCoreApplication>
#include <QFileInfo>
#include <QDebug>

#define DEBUG_PP(X) qDebug() << #X << X;
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QString root = a.applicationFilePath().split("/").first();
DEBUG_PP(root);
DEBUG_PP(QFileInfo(root).canonicalFilePath())
DEBUG_PP(QFileInfo("C:").canonicalFilePath())
DEBUG_PP(QFileInfo("Z:").canonicalFilePath())
DEBUG_PP(QFileInfo("C:").absoluteFilePath())
DEBUG_PP(QFileInfo("Z:").absoluteFilePath())
DEBUG_PP(QFileInfo("C:/").canonicalFilePath())
DEBUG_PP(QFileInfo("Z:/").canonicalFilePath())
DEBUG_PP(QFileInfo("C:/").absoluteFilePath())
DEBUG_PP(QFileInfo("Z:/").absoluteFilePath())
return 0;

"""
produces the following output
"""
Starting C:\Users\Kim\Documents\build-qt_fs_win_fail-5_4_1_msvc2012-Debug\debug\qt_fs_win_fail.exe...
root "C:"
QFileInfo(root).canonicalFilePath() "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug"
QFileInfo("C:").canonicalFilePath() "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug"
QFileInfo("Z:").canonicalFilePath() "Z:/"
QFileInfo("C:").absoluteFilePath() "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug"
QFileInfo("Z:").absoluteFilePath() "Z:/"
QFileInfo("C:/").canonicalFilePath() "C:/"
QFileInfo("Z:/").canonicalFilePath() "Z:/"
QFileInfo("C:/").absoluteFilePath() "C:/"
QFileInfo("Z:/").absoluteFilePath() "Z:/"
"""
This is not what i expected. And the documentation says nothing about requiring a trailing / to ensure that resolving paths correctly work.

Also
"""
#include <QCoreApplication>
#include <QDir>
#include <QDebug>
#include <QFileInfo>

int main(int argc, char *argv[])
{
auto fn = [](QString s){
const QFileInfoList lst = QDir(s).entryInfoList(QDir::Hidden | QDir::Files | QDir::Dirs | QDir::System | QDir::NoDotAndDotDot);
if(lst.isEmpty())

qDebug() << "##### does exist...";
foreach(QFileInfo fi, lst)
qDebug() << fi.absoluteFilePath() << "exists" << fi.exists();
qDebug() << "##### does not exist...";
foreach(QFileInfo fi, lst)
qDebug() << fi.absoluteFilePath() << "exists" << fi.exists() << "issymlink" << fi.isSymLink();
};
QCoreApplication a(argc, argv);
fn(a.applicationDirPath()+"/wat.lnk");
return 0;
}

"""
The produced output of each foreach() loop is a list each file and folder present on the drive (presumably C this was run on prepended with QCoreApplication::applicationDirPath()+"/wat.lnk/"
The expected output should be "empty" (provided you don't actually have a valid shortcut called wat.lnk in your build folder)
This is a snippet of the output on my windows 8.1 device:
"""

1. 1. 1. 1. 1. does exist...
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/$Recycle.Bin" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/dev" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Go" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/hiberfil.sys" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Jenkins" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/pagefile.sys" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/PerfLogs" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Perl64" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Program Files" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Program Files (x86)" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/ProgramData" exists true
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Qt" exists true
               (...)
            2. does not exist...
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/$Recycle.Bin" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/dev" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Go" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/hiberfil.sys" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Jenkins" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/pagefile.sys" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/PerfLogs" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Perl64" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Program Files" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Program Files (x86)" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/ProgramData" exists false issymlink false
               "C:/Users/Kim/Documents/build-qt_fs_win_fail-5_4_1_msvc2012-Debug/debug/wat.lnk/Qt" exists false issymlink false
               (...)
               """

What happened here?
QDir("non-existing.lnk").entryInfoList(flags) was given a path that does not exist AND ends with .lnk.
The ".lnk" suffix is important. If any other suffix had been used the output would have been "empty" as expected.
So this is probably related to how qt resolves windows shortcuts.

There is also the issue of the first loop printing exists true (which obviously is not the case) and the second loop printing exists false and the only difference being that issymlink() is called before exists() is. And issymlink() should be const.

Sorry if i should not have lumped these two cases together, but they seemed related to me.