===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/arguments.c,v
retrieving revision 1.55
retrieving revision 1.56
diff -c -r1.55 -r1.56
*** src/usr.bin/tmux/arguments.c	2022/06/07 10:02:19	1.55
--- src/usr.bin/tmux/arguments.c	2022/08/02 09:23:34	1.56
***************
*** 1,4 ****
! /* $OpenBSD: arguments.c,v 1.55 2022/06/07 10:02:19 nicm Exp $ */
  
  /*
   * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
--- 1,4 ----
! /* $OpenBSD: arguments.c,v 1.56 2022/08/02 09:23:34 nicm Exp $ */
  
  /*
   * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
***************
*** 895,900 ****
--- 895,904 ----
  		*cause = xstrdup("missing");
  		return (0);
  	}
+ 	if (TAILQ_EMPTY(&entry->values)) {
+ 		*cause = xstrdup("empty");
+ 		return (0);
+ 	}
  	value = TAILQ_LAST(&entry->values, args_values)->string;
  	return (args_string_percentage(value, minval, maxval, curval, cause));
  }
***************
*** 909,914 ****
--- 913,922 ----
  	size_t		 valuelen = strlen(value);
  	char		*copy;
  
+ 	if (valuelen == 0) {
+ 		*cause = xstrdup("empty");
+ 		return (0);
+ 	}
  	if (value[valuelen - 1] == '%') {
  		copy = xstrdup(value);
  		copy[valuelen - 1] = '\0';
***************
*** 953,958 ****
--- 961,970 ----
  
  	if ((entry = args_find(args, flag)) == NULL) {
  		*cause = xstrdup("missing");
+ 		return (0);
+ 	}
+ 	if (TAILQ_EMPTY(&entry->values)) {
+ 		*cause = xstrdup("empty");
  		return (0);
  	}
  	value = TAILQ_LAST(&entry->values, args_values)->string;