3 files changed, 28 insertions, 10 deletions
diff --git a/src/gui/image/qicon.cpp b/src/gui/image/qicon.cpp
index bf6eb8d..fad51f4 100644
--- a/src/gui/image/qicon.cpp
+++ b/src/gui/image/qicon.cpp
@@ -982,7 +982,9 @@ QIcon QIcon::fromTheme(const QString &name, const QIcon &fallback)
         icon = *cachedIcon;
     }
 
-    if (icon.availableSizes().isEmpty())
+    // Note the qapp check is to allow lazy loading of static icons
+    // Supporting fallbacks will not work for this case.
+    if (qApp && icon.availableSizes().isEmpty())
         return fallback;
 
     return icon;
diff --git a/src/gui/image/qiconloader.cpp b/src/gui/image/qiconloader.cpp
index b35e80a..72ec2e8 100644
--- a/src/gui/image/qiconloader.cpp
+++ b/src/gui/image/qiconloader.cpp
@@ -85,19 +85,30 @@ static QString fallbackTheme()
 }
 
 QIconLoader::QIconLoader() :
-        m_themeKey(1), m_supportsSvg(false)
+        m_themeKey(1), m_supportsSvg(false), m_initialized(false)
 {
-    m_systemTheme = qt_guiPlatformPlugin()->systemIconThemeName();
-    if (m_systemTheme.isEmpty())
-        m_systemTheme = fallbackTheme();
+}
+
+// We lazily initialize the loader to make static icons
+// work. Though we do not officially support this.
+void QIconLoader::ensureInitialized()
+{
+    if (!m_initialized) {
+        m_initialized = true;
+
+        Q_ASSERT(qApp);
 
+        m_systemTheme = qt_guiPlatformPlugin()->systemIconThemeName();
+        if (m_systemTheme.isEmpty())
+            m_systemTheme = fallbackTheme();
 #ifndef QT_NO_LIBRARY
-    QFactoryLoader iconFactoryLoader(QIconEngineFactoryInterfaceV2_iid,
-                                     QLatin1String("/iconengines"),
-                                     Qt::CaseInsensitive);
-    if (iconFactoryLoader.keys().contains(QLatin1String("svg")))
-        m_supportsSvg = true;
+        QFactoryLoader iconFactoryLoader(QIconEngineFactoryInterfaceV2_iid,
+                                         QLatin1String("/iconengines"),
+                                         Qt::CaseInsensitive);
+        if (iconFactoryLoader.keys().contains(QLatin1String("svg")))
+            m_supportsSvg = true;
 #endif //QT_NO_LIBRARY
+    }
 }
 
 QIconLoader *QIconLoader::instance()
@@ -339,6 +350,9 @@ bool QIconLoaderEngine::hasIcon() const
 // Lazily load the icon
 void QIconLoaderEngine::ensureLoaded()
 {
+
+    iconLoaderInstance()->ensureInitialized();
+
     if (!(iconLoaderInstance()->themeKey() == m_key)) {
 
         while (!m_entries.isEmpty())
diff --git a/src/gui/image/qiconloader_p.h b/src/gui/image/qiconloader_p.h
index 19f2dda..a6b5f5b 100644
--- a/src/gui/image/qiconloader_p.h
+++ b/src/gui/image/qiconloader_p.h
@@ -169,6 +169,7 @@ public:
     static QIconLoader *instance();
     void updateSystemTheme();
     void invalidateKey() { m_themeKey++; }
+    void ensureInitialized();
 
 private:
     QThemeIconEntries findIconHelper(const QString &themeName,
@@ -176,6 +177,7 @@ private:
                                      QStringList &visited) const;
     uint m_themeKey;
     bool m_supportsSvg;
+    bool m_initialized;
 
     mutable QString m_userTheme;
     mutable QString m_systemTheme;