When uninstalling/updating a module, we may execute unlink method on product.template before product.product. In such cases, the product is already removed after removeing the template (_inherits) and the chained unlink of the product would fail (traceback when browsing).
unlink_ids = []
unlink_product_tmpl_ids = []
for product in self.browse(cr, uid, ids, context=context):
+ # Check if product still exists, in case it has been unlinked by unlinking its template
+ if not product.exists():
+ continue
tmpl_id = product.product_tmpl_id.id
# Check if the product is last product of this template
other_product_ids = self.search(cr, uid, [('product_tmpl_id', '=', tmpl_id), ('id', '!=', product.id)], context=context)