Fix QTemporaryFile::open() failing after remove().

If a QTemporaryFile is constructed using a template file path,
the path is generated in QTemporaryFileEngine::open() and then
filePathIsTemplate is set to false. If remove() and then open()
are called on the same QTemporaryFile, the path is not regenerated.
This change ensures that if the file path was generated, it will be
generated again in the scenario above.

Task-number: QTBUG-2557
Change-Id: I718ceb89daa9a9d46fdbe811fecc3d57d6dc08c2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/src/corelib/io/qtemporaryfile.cpp b/src/corelib/io/qtemporaryfile.cpp
index cb8b5dbefc..56b3d17dc1 100644
--- a/src/corelib/io/qtemporaryfile.cpp
+++ b/src/corelib/io/qtemporaryfile.cpp
@@ -223,7 +223,8 @@ class QTemporaryFileEngine : public QFSFileEngine
     Q_DECLARE_PRIVATE(QFSFileEngine)
 public:
     QTemporaryFileEngine(const QString &file, bool fileIsTemplate = true)
-        : QFSFileEngine(), filePathIsTemplate(fileIsTemplate)
+        : QFSFileEngine(), filePathIsTemplate(fileIsTemplate),
+          filePathWasTemplate(fileIsTemplate)
     {
         Q_D(QFSFileEngine);
         d->fileEntry = QFileSystemEntry(file);
@@ -244,6 +245,7 @@ public:
     bool close();
 
     bool filePathIsTemplate;
+    bool filePathWasTemplate;
 };
 
 QTemporaryFileEngine::~QTemporaryFileEngine()
@@ -379,6 +381,12 @@ bool QTemporaryFileEngine::remove()
     QFSFileEngine::close();
     if (QFSFileEngine::remove()) {
         d->fileEntry.clear();
+        // If a QTemporaryFile is constructed using a template file path, the path
+        // is generated in QTemporaryFileEngine::open() and then filePathIsTemplate
+        // is set to false. If remove() and then open() are called on the same
+        // QTemporaryFile, the path is not regenerated. Here we ensure that if the
+        // file path was generated, it will be generated again in the scenario above.
+        filePathIsTemplate = filePathWasTemplate;
         return true;
     }
     return false;