Do not crash when loading themed icons statically

We do not officially support static loading of icons.
In fact they still crash for simple png cases due to missing
X11 resources. But since we lazily create themed icons
we can certainly avoid the crash in this case. You will
not be able to use fallbacks here though, since we cannot
know if a fallback should be used or not in this case.

Reviewed-by: ogoffart
Task-number: QTBUG-8666

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gui/image/qiconloader_p.h b/src/gui/image/qiconloader_p.h
index 19f2ddaf56..a6b5f5bf12 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;