diff -urpx '.*.sw?' qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qfiledevice.cpp qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qfiledevice.cpp
--- qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qfiledevice.cpp	2018-09-13 07:25:10.000000000 +0300
+++ qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qfiledevice.cpp	2019-04-10 17:05:59.770267045 +0300
@@ -55,7 +55,7 @@ QT_BEGIN_NAMESPACE
 QFileDevicePrivate::QFileDevicePrivate()
     : fileEngine(0),
       cachedSize(0),
-      error(QFile::NoError), lastWasWrite(false)
+      error(QFile::NoError), savedError(QFile::NoError), lastWasWrite(false)
 {
     writeBufferChunkSize = QFILE_WRITEBUFFER_SIZE;
 }
@@ -76,18 +76,24 @@ QAbstractFileEngine * QFileDevicePrivate
 void QFileDevicePrivate::setError(QFileDevice::FileError err)
 {
     error = err;
+    if (err != QFileDevice::NoError)
+        savedError = err;
     errorString.clear();
 }
 
 void QFileDevicePrivate::setError(QFileDevice::FileError err, const QString &errStr)
 {
     error = err;
+    if (err != QFileDevice::NoError)
+        savedError = err;
     errorString = errStr;
 }
 
 void QFileDevicePrivate::setError(QFileDevice::FileError err, int errNum)
 {
     error = err;
+    if (err != QFileDevice::NoError)
+        savedError = err;
     errorString = qt_error_string(errNum);
 }
 
diff -urpx '.*.sw?' qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qfiledevice_p.h qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qfiledevice_p.h
--- qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qfiledevice_p.h	2018-09-13 07:25:10.000000000 +0300
+++ qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qfiledevice_p.h	2019-04-10 17:06:40.489608303 +0300
@@ -80,6 +80,10 @@ protected:
 
     QFileDevice::FileHandleFlags handleFlags;
     QFileDevice::FileError error;
+    // After initialization, savedError is never set to NoError by
+    // QFileDevice(Private). Any other value provided to setError is saved to
+    // savedError.
+    QFileDevice::FileError savedError;
 
     bool lastWasWrite;
 };
diff -urpx '.*.sw?' qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qsavefile.cpp qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qsavefile.cpp
--- qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qsavefile.cpp	2018-09-13 07:25:10.000000000 +0300
+++ qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qsavefile.cpp	2019-04-10 17:09:22.840631492 +0300
@@ -56,8 +56,7 @@
 QT_BEGIN_NAMESPACE
 
 QSaveFilePrivate::QSaveFilePrivate()
-    : writeError(QFileDevice::NoError),
-      useTemporaryFile(true),
+    : useTemporaryFile(true),
       directWriteFallback(false)
 {
 }
@@ -212,13 +211,11 @@ bool QSaveFile::open(OpenMode mode)
     QFileInfo existingFile(d->fileName);
     if (existingFile.exists() && !existingFile.isWritable()) {
         d->setError(QFileDevice::WriteError, QSaveFile::tr("Existing file %1 is not writable").arg(d->fileName));
-        d->writeError = QFileDevice::WriteError;
         return false;
     }
 
     if (existingFile.isDir()) {
         d->setError(QFileDevice::WriteError, QSaveFile::tr("Filename refers to a directory"));
-        d->writeError = QFileDevice::WriteError;
         return false;
     }
 
@@ -335,9 +332,9 @@ bool QSaveFile::commit()
     d->fileEngine->syncToDisk();
 
     if (d->useTemporaryFile) {
-        if (d->writeError != QFileDevice::NoError) {
+        if (d->savedError != QFileDevice::NoError) {
             d->fileEngine->remove();
-            d->writeError = QFileDevice::NoError;
+            d->savedError = QFileDevice::NoError;
             delete d->fileEngine;
             d->fileEngine = 0;
             return false;
@@ -382,7 +379,6 @@ void QSaveFile::cancelWriting()
     if (!isOpen())
         return;
     d->setError(QFileDevice::WriteError, QSaveFile::tr("Writing canceled by application"));
-    d->writeError = QFileDevice::WriteError;
 }
 
 /*!
@@ -391,13 +387,11 @@ void QSaveFile::cancelWriting()
 qint64 QSaveFile::writeData(const char *data, qint64 len)
 {
     Q_D(QSaveFile);
-    if (d->writeError != QFileDevice::NoError)
+    if (d->savedError != QFileDevice::NoError)
         return -1;
 
     const qint64 ret = QFileDevice::writeData(data, len);
 
-    if (d->error != QFileDevice::NoError)
-        d->writeError = d->error;
     return ret;
 }
 
diff -urpx '.*.sw?' qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qsavefile_p.h qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qsavefile_p.h
--- qt-everywhere-src-5.11.2.orig/qtbase/src/corelib/io/qsavefile_p.h	2018-09-13 07:25:10.000000000 +0300
+++ qt-everywhere-src-5.11.2/qtbase/src/corelib/io/qsavefile_p.h	2019-04-10 17:06:59.067964888 +0300
@@ -70,8 +70,6 @@ protected:
     QString fileName;
     QString finalFileName; // fileName with symbolic links resolved
 
-    QFileDevice::FileError writeError;
-
     bool useTemporaryFile;
     bool directWriteFallback;
 };