patch 8.2.0920: writing viminfo fails with a circular reference Commit: https://github.com/vim/vim/commit/5b157fe2edfdce5f77080aeac2b4a03f39eb1c1a Author: Bram Moolenaar <Bram@vim.org> Date: Sun Jun 7 16:08:08 2020 +0200 patch 8.2.0920: writing viminfo fails with a circular reference Problem: Writing viminfo fails with a circular reference. Solution: Use copyID to detect the cycle. (closes https://github.com/vim/vim/issues/6217)

/* 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