Make it run with Qt6

This is a huge commit. Changes:
* Obviously, make it compile
* Make it run (only scarcely tested)
* get rid of most of clang's warnings

Let's see what surprises are in store...

1 files changed, 2 insertions, 2 deletions

diff --git a/copyworker.cpp b/copyworker.cpp
index 0fbc802..22e62f4 100644
--- a/copyworker.cpp
+++ b/copyworker.cpp
@@ -15,7 +15,7 @@ CopyWorker::CopyWorker(QObject *parent) : QThread(parent), mMax(0) {}
 
 void CopyWorker::enqueue(const QString &source, const QString &destination){
     QMutexLocker l(&mSourceMx);
-    QPair<QString, QString> x = qMakePair<QString, QString>(source, destination);
+    std::pair<QString, QString> x(source, destination);
     if(!mFiles.contains(x)){
         QFileInfo fi(source);
         mFiles.append(x);
@@ -74,7 +74,7 @@ void CopyWorker::run(){
             qint64 cur = total / 1024 / 1024;
             emit bytesRead(cur);
         }
-        delete buf;
+        delete[] buf;
     }
     QString s = QString(tr("Done copying %1 file(s)")).arg(QString::number(mFiles.size()));
     emit success(s);