Bug 1662834 [Linux] Check mGdkWindow validity on nsWindow::UpdateTitl…

…ebarTransparencyBitmap(), r=jhorak Differential Revision: https://phabricator.services.mozilla.com/D90144
iaxat · Sep 16, 2020 · e9149d4 · e9149d4
1 parent deee76e
commit e9149d4
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/widget/gtk/nsWindow.cpp b/widget/gtk/nsWindow.cpp
@@ -5609,8 +5609,9 @@ void nsWindow::UpdateTitlebarTransparencyBitmap() {
   NS_ASSERTION(mTransparencyBitmapForTitlebar,
                "Transparency bitmap is already used to draw window shape");
 
-  if (!mDrawInTitlebar || (mBounds.width == mTransparencyBitmapWidth &&
-                           mBounds.height == mTransparencyBitmapHeight)) {
+  if (!mGdkWindow || !mDrawInTitlebar ||
+      (mBounds.width == mTransparencyBitmapWidth &&
+       mBounds.height == mTransparencyBitmapHeight)) {
     return;
   }