patch 8.2.0633: crash when using null partial in filter() Commit: https://github.com/vim/vim/commit/9d8d0b5c644ea53364d04403740b3f23e57c1497 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Apr 24 22:47:31 2020 +0200 patch 8.2.0633: crash when using null partial in filter() Problem: Crash when using null partial in filter(). Solution: Fix crash. Add more tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/5976)

/* vi:set ts=8 sts=4 sw=4 noet:
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

#ifdef __QNXNTO__
# include <sys/procmgr.h>
#endif

#define	USE_TMPNAM

#define POSIX	    // Used by pty.c

#if defined(FEAT_GUI_PHOTON)
extern int is_photon_available;
#endif