diff --git a/7.3.155 b/7.3.155
new file mode 100644
index 0000000..806efca
--- /dev/null
+++ b/7.3.155
@@ -0,0 +1,286 @@
+To: vim_dev@googlegroups.com
+Subject: Patch 7.3.155
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.3.155
+Problem: Crash when using map(), filter() and remove() on v:. (ZyX)
+ Also for extend(). (Yukihiro Nakadaira)
+Solution: Mark v: as locked. Also correct locking error messages.
+Files: src/eval.c
+
+
+*** ../vim-7.3.154/src/eval.c 2011-04-01 16:07:41.000000000 +0200
+--- src/eval.c 2011-04-11 13:28:34.000000000 +0200
+***************
+*** 853,858 ****
+--- 853,859 ----
+
+ init_var_dict(&globvardict, &globvars_var);
+ init_var_dict(&vimvardict, &vimvars_var);
++ vimvardict.dv_lock = VAR_FIXED;
+ hash_init(&compat_hashtab);
+ hash_init(&func_hashtab);
+
+***************
+*** 8545,8551 ****
+ if (argvars[0].v_type == VAR_LIST)
+ {
+ if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)"add()")
+ && list_append_tv(l, &argvars[1]) == OK)
+ copy_tv(&argvars[0], rettv);
+ }
+--- 8546,8552 ----
+ if (argvars[0].v_type == VAR_LIST)
+ {
+ if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)_("add() argument"))
+ && list_append_tv(l, &argvars[1]) == OK)
+ copy_tv(&argvars[0], rettv);
+ }
+***************
+*** 9946,9951 ****
+--- 9947,9954 ----
+ typval_T *argvars;
+ typval_T *rettv;
+ {
++ char *arg_errmsg = N_("extend() argument");
++
+ if (argvars[0].v_type == VAR_LIST && argvars[1].v_type == VAR_LIST)
+ {
+ list_T *l1, *l2;
+***************
+*** 9955,9961 ****
+
+ l1 = argvars[0].vval.v_list;
+ l2 = argvars[1].vval.v_list;
+! if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)"extend()")
+ && l2 != NULL)
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+--- 9958,9964 ----
+
+ l1 = argvars[0].vval.v_list;
+ l2 = argvars[1].vval.v_list;
+! if (l1 != NULL && !tv_check_lock(l1->lv_lock, (char_u *)_(arg_errmsg))
+ && l2 != NULL)
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+***************
+*** 9994,10000 ****
+
+ d1 = argvars[0].vval.v_dict;
+ d2 = argvars[1].vval.v_dict;
+! if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)"extend()")
+ && d2 != NULL)
+ {
+ /* Check the third argument. */
+--- 9997,10003 ----
+
+ d1 = argvars[0].vval.v_dict;
+ d2 = argvars[1].vval.v_dict;
+! if (d1 != NULL && !tv_check_lock(d1->dv_lock, (char_u *)_(arg_errmsg))
+ && d2 != NULL)
+ {
+ /* Check the third argument. */
+***************
+*** 10236,10255 ****
+ typval_T save_key;
+ int rem;
+ int todo;
+! char_u *ermsg = map ? (char_u *)"map()" : (char_u *)"filter()";
+ int save_did_emsg;
+ int idx = 0;
+
+ if (argvars[0].v_type == VAR_LIST)
+ {
+ if ((l = argvars[0].vval.v_list) == NULL
+! || (map && tv_check_lock(l->lv_lock, ermsg)))
+ return;
+ }
+ else if (argvars[0].v_type == VAR_DICT)
+ {
+ if ((d = argvars[0].vval.v_dict) == NULL
+! || (map && tv_check_lock(d->dv_lock, ermsg)))
+ return;
+ }
+ else
+--- 10239,10260 ----
+ typval_T save_key;
+ int rem;
+ int todo;
+! char_u *ermsg = (char_u *)(map ? "map()" : "filter()");
+! char *arg_errmsg = (map ? N_("map() argument")
+! : N_("filter() argument"));
+ int save_did_emsg;
+ int idx = 0;
+
+ if (argvars[0].v_type == VAR_LIST)
+ {
+ if ((l = argvars[0].vval.v_list) == NULL
+! || tv_check_lock(l->lv_lock, (char_u *)_(arg_errmsg)))
+ return;
+ }
+ else if (argvars[0].v_type == VAR_DICT)
+ {
+ if ((d = argvars[0].vval.v_dict) == NULL
+! || tv_check_lock(d->dv_lock, (char_u *)_(arg_errmsg)))
+ return;
+ }
+ else
+***************
+*** 10286,10292 ****
+ {
+ --todo;
+ di = HI2DI(hi);
+! if (tv_check_lock(di->di_tv.v_lock, ermsg))
+ break;
+ vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
+ if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL
+--- 10291,10298 ----
+ {
+ --todo;
+ di = HI2DI(hi);
+! if (tv_check_lock(di->di_tv.v_lock,
+! (char_u *)_(arg_errmsg)))
+ break;
+ vimvars[VV_KEY].vv_str = vim_strsave(di->di_key);
+ if (filter_map_one(&di->di_tv, expr, map, &rem) == FAIL
+***************
+*** 10305,10311 ****
+
+ for (li = l->lv_first; li != NULL; li = nli)
+ {
+! if (tv_check_lock(li->li_tv.v_lock, ermsg))
+ break;
+ nli = li->li_next;
+ vimvars[VV_KEY].vv_nr = idx;
+--- 10311,10317 ----
+
+ for (li = l->lv_first; li != NULL; li = nli)
+ {
+! if (tv_check_lock(li->li_tv.v_lock, (char_u *)_(arg_errmsg)))
+ break;
+ nli = li->li_next;
+ vimvars[VV_KEY].vv_nr = idx;
+***************
+*** 12910,12916 ****
+ if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listarg), "insert()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)"insert()"))
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+ before = get_tv_number_chk(&argvars[2], &error);
+--- 12916,12922 ----
+ if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listarg), "insert()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)_("insert() argument")))
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+ before = get_tv_number_chk(&argvars[2], &error);
+***************
+*** 14775,14787 ****
+ char_u *key;
+ dict_T *d;
+ dictitem_T *di;
+
+ if (argvars[0].v_type == VAR_DICT)
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+ EMSG2(_(e_toomanyarg), "remove()");
+ else if ((d = argvars[0].vval.v_dict) != NULL
+! && !tv_check_lock(d->dv_lock, (char_u *)"remove() argument"))
+ {
+ key = get_tv_string_chk(&argvars[1]);
+ if (key != NULL)
+--- 14781,14794 ----
+ char_u *key;
+ dict_T *d;
+ dictitem_T *di;
++ char *arg_errmsg = N_("remove() argument");
+
+ if (argvars[0].v_type == VAR_DICT)
+ {
+ if (argvars[2].v_type != VAR_UNKNOWN)
+ EMSG2(_(e_toomanyarg), "remove()");
+ else if ((d = argvars[0].vval.v_dict) != NULL
+! && !tv_check_lock(d->dv_lock, (char_u *)_(arg_errmsg)))
+ {
+ key = get_tv_string_chk(&argvars[1]);
+ if (key != NULL)
+***************
+*** 14801,14807 ****
+ else if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listdictarg), "remove()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)"remove() argument"))
+ {
+ int error = FALSE;
+
+--- 14808,14814 ----
+ else if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listdictarg), "remove()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)_(arg_errmsg)))
+ {
+ int error = FALSE;
+
+***************
+*** 15135,15141 ****
+ if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listarg), "reverse()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)"reverse()"))
+ {
+ li = l->lv_last;
+ l->lv_first = l->lv_last = NULL;
+--- 15142,15148 ----
+ if (argvars[0].v_type != VAR_LIST)
+ EMSG2(_(e_listarg), "reverse()");
+ else if ((l = argvars[0].vval.v_list) != NULL
+! && !tv_check_lock(l->lv_lock, (char_u *)_("reverse() argument")))
+ {
+ li = l->lv_last;
+ l->lv_first = l->lv_last = NULL;
+***************
+*** 16432,16438 ****
+ else
+ {
+ l = argvars[0].vval.v_list;
+! if (l == NULL || tv_check_lock(l->lv_lock, (char_u *)"sort()"))
+ return;
+ rettv->vval.v_list = l;
+ rettv->v_type = VAR_LIST;
+--- 16439,16446 ----
+ else
+ {
+ l = argvars[0].vval.v_list;
+! if (l == NULL || tv_check_lock(l->lv_lock,
+! (char_u *)_("sort() argument")))
+ return;
+ rettv->vval.v_list = l;
+ rettv->v_type = VAR_LIST;
+*** ../vim-7.3.154/src/version.c 2011-04-02 15:12:45.000000000 +0200
+--- src/version.c 2011-04-11 13:13:38.000000000 +0200
+***************
+*** 716,717 ****
+--- 716,719 ----
+ { /* Add new patch number below this line */
++ /**/
++ 155,
+ /**/
+
+--
+I used to be indecisive, now I'm not sure.
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///