From f53ab9d7363e2fb3b63cec1a00851f84f901de18 Mon Sep 17 00:00:00 2001
From: Aleksey Lysenko <lysenkoalexmail@gmail.com>
Date: Mon, 30 Jan 2017 22:55:57 +0200
Subject: Reset QFileDevicePrivate::cachedSize on file close

When a QFile object is reused, the atEnd() method may return incorrect
values. The reason for this is that QFileDevicePrivate::cachedSize is
not cleared. Setting cachedSize = 0 in the close() method fixes this issue.

Task-number: QTBUG-57698
Change-Id: I828a2cf844e98d581098f2c781fa47d2cd3275ce
Reviewed-by: Alex Trotsenko <alex1973tr@gmail.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
---
 src/corelib/io/qfiledevice.cpp | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/corelib/io/qfiledevice.cpp')

diff --git a/src/corelib/io/qfiledevice.cpp b/src/corelib/io/qfiledevice.cpp
index 20cfa5bdaf..ce9c8275ce 100644
--- a/src/corelib/io/qfiledevice.cpp
+++ b/src/corelib/io/qfiledevice.cpp
@@ -328,6 +328,9 @@ void QFileDevice::close()
     d->lastWasWrite = false;
     d->writeBuffer.clear();
 
+    // reset cached size
+    d->cachedSize = 0;
+
     // keep earlier error from flush
     if (d->fileEngine->close() && flushed)
         unsetError();
-- 
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