Change Q_ASSERTs in qquick[threaded]windowmanager.cpp to qWarning().

As they also triggers when a non-existing file is loaded into QML2
or windows have invalid sizes.

Change-Id: Iab1ce6c99f2bc2cb360ddaccce539cb97979ad5a
Reviewed-by: Kai Koehne <kai.koehne@digia.com>
Reviewed-by: Christiaan Janssen <christiaan.janssen@digia.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/src/quick/items/qquickwindowmanager.cpp b/src/quick/items/qquickwindowmanager.cpp
index dd27182ffe..50887e8e99 100644
--- a/src/quick/items/qquickwindowmanager.cpp
+++ b/src/quick/items/qquickwindowmanager.cpp
@@ -225,7 +225,13 @@ void QQuickTrivialWindowManager::renderWindow(QQuickWindow *window)
     if (!masterWindow)
         return;
 
-    Q_ASSERT(QQuickWindowPrivate::get(masterWindow)->isRenderable());
+    if (!QQuickWindowPrivate::get(masterWindow)->isRenderable()) {
+        qWarning().nospace()
+            << "Unable to find a renderable master window "
+            << masterWindow << "when trying to render"
+            << window << " (" << window->geometry() << ").";
+        return;
+    }
 
     if (!gl) {
         gl = new QOpenGLContext();