Merge remote branch 'qt/4.6' into qt-master-from-4.6

Conflicts:
	src/gui/kernel/qeventdispatcher_mac.mm
	src/gui/kernel/qt_cocoa_helpers_mac.mm
	src/gui/widgets/qmenu_mac.mm
	tests/auto/qgraphicswidget/tst_qgraphicswidget.cpp
	tools/assistant/tools/assistant/centralwidget.cpp
	tools/linguist/lupdate/main.cpp

3 files changed, 30 insertions, 21 deletions

diff --git a/src/corelib/io/qfsfileengine_unix.cpp b/src/corelib/io/qfsfileengine_unix.cpp
index 722d6d3..9179485 100644
--- a/src/corelib/io/qfsfileengine_unix.cpp
+++ b/src/corelib/io/qfsfileengine_unix.cpp
@@ -98,7 +98,7 @@ static inline QByteArray openModeToFopenMode(QIODevice::OpenMode flags, const QS
             if (!fileName.isEmpty()
                 && QT_STAT(QFile::encodeName(fileName), &statBuf) == 0
                 && (statBuf.st_mode & S_IFMT) == S_IFREG) {
-                mode += "+";
+                mode += '+';
             } else {
                 mode = "wb+";
             }
diff --git a/src/corelib/io/qsettings.cpp b/src/corelib/io/qsettings.cpp
index 2c31509..64015ce 100644
--- a/src/corelib/io/qsettings.cpp
+++ b/src/corelib/io/qsettings.cpp
@@ -1091,30 +1091,23 @@ static inline int pathHashKey(QSettings::Format format, QSettings::Scope scope)
     return int((uint(format) << 1) | uint(scope == QSettings::SystemScope));
 }
 
-static QString getPath(QSettings::Format format, QSettings::Scope scope)
+static void initDefaultPaths(QMutexLocker *locker)
 {
-    Q_ASSERT((int)QSettings::NativeFormat == 0);
-    Q_ASSERT((int)QSettings::IniFormat == 1);
-
+    PathHash *pathHash = pathHashFunc();
     QString homePath = QDir::homePath();
     QString systemPath;
 
-    QMutexLocker locker(globalMutex());
-    PathHash *pathHash = pathHashFunc();
-    bool loadSystemPath = pathHash->isEmpty();
-    locker.unlock();
-
-    if (loadSystemPath) {
-        /*
-           QLibraryInfo::location() uses QSettings, so in order to
-           avoid a dead-lock, we can't hold the global mutex while
-           calling it.
-       */
-        systemPath = QLibraryInfo::location(QLibraryInfo::SettingsPath);
-        systemPath += QLatin1Char('/');
-    }
+    locker->unlock();
+	
+    /*
+       QLibraryInfo::location() uses QSettings, so in order to
+       avoid a dead-lock, we can't hold the global mutex while
+       calling it.
+    */
+    systemPath = QLibraryInfo::location(QLibraryInfo::SettingsPath);
+    systemPath += QLatin1Char('/');
 
-    locker.relock();
+    locker->relock();
     if (pathHash->isEmpty()) {
         /*
            Lazy initialization of pathHash. We initialize the
@@ -1155,6 +1148,17 @@ static QString getPath(QSettings::Format format, QSettings::Scope scope)
 #endif
 #endif
     }
+}
+
+static QString getPath(QSettings::Format format, QSettings::Scope scope)
+{
+    Q_ASSERT((int)QSettings::NativeFormat == 0);
+    Q_ASSERT((int)QSettings::IniFormat == 1);
+
+    QMutexLocker locker(globalMutex());
+    PathHash *pathHash = pathHashFunc();
+    if (pathHash->isEmpty())
+        initDefaultPaths(&locker);
 
     QString result = pathHash->value(pathHashKey(format, scope));
     if (!result.isEmpty())
@@ -3455,6 +3459,8 @@ void QSettings::setPath(Format format, Scope scope, const QString &path)
 {
     QMutexLocker locker(globalMutex());
     PathHash *pathHash = pathHashFunc();
+    if (pathHash->isEmpty())
+        initDefaultPaths(&locker);
     pathHash->insert(pathHashKey(format, scope), path + QDir::separator());
 }
 
diff --git a/src/corelib/io/qurl.cpp b/src/corelib/io/qurl.cpp
index a131d6c..076cc33 100644
--- a/src/corelib/io/qurl.cpp
+++ b/src/corelib/io/qurl.cpp
@@ -3241,8 +3241,11 @@ static QString qt_ACE_do(const QString &domain, AceOperation op)
     while (1) {
         int idx = nextDotDelimiter(domain, lastIdx);
         int labelLength = idx - lastIdx;
-        if (labelLength == 0)
+        if (labelLength == 0) {
+            if (idx == domain.length())
+                break;
             return QString(); // two delimiters in a row -- empty label not allowed
+        }
 
         // RFC 3490 says, about the ToASCII operation:
         //   3. If the UseSTD3ASCIIRules flag is set, then perform these checks: