If the dibsection is based on a file-mapping object, then make sure

dlls/x11drv/bitmap.c

@@ -419,11 +419,11 @@ BOOL X11DRV_DeleteBitmap( HBITMAP hbitmap )
     BITMAPOBJ *bmp = (BITMAPOBJ *) GDI_GetObjPtr( hbitmap, BITMAP_MAGIC );
     if (bmp)
     {
+        if (bmp->dib) X11DRV_DIB_DeleteDIBSection( bmp );
         wine_tsx11_lock();
         if (bmp->physBitmap) XFreePixmap( gdi_display, (Pixmap)bmp->physBitmap );
         bmp->physBitmap = NULL;
         wine_tsx11_unlock();
-        if (bmp->dib) X11DRV_DIB_DeleteDIBSection( bmp );
         GDI_ReleaseObj( hbitmap );
     }
     return TRUE;

dlls/x11drv/dib.c

@@ -4884,6 +4884,9 @@ void X11DRV_DIB_DeleteDIBSection(BITMAPOBJ *bmp)
 {
   X11DRV_DIBSECTION *dib = (X11DRV_DIBSECTION *) bmp->dib;
 
+  if (dib->dibSection.dshSection)
+      X11DRV_DIB_Coerce(bmp, DIB_Status_InSync, FALSE);
+
   if (dib->image)
   {
       wine_tsx11_lock();