patch 8.1.1845: may use NULL pointer when running out of memory commit https://github.com/vim/vim/commit/6ace95e9810bdfef5392ad89efc9e4ad4606de28 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Aug 13 23:09:49 2019 +0200 patch 8.1.1845: may use NULL pointer when running out of memory Problem: May use NULL pointer when running out of memory. Solution: Do not clear popup buffers when NULL. (closes https://github.com/vim/vim/issues/4802)