# HG changeset patch
# User Bram Moolenaar <bram@vim.org>
# Date 1276366322 -7200
# Node ID 0c1e413c32f1f3f8e28ebf8a030cedeeb664cd46
# Parent  b0ebf9d121ff99eb2e1697a35dca528e7ecb8f4c
updated for version 7.2.443
Problem:    Using taglist() on a tag file with duplicate fields generates an
	    internal error. (Peter Odding)
Solution:   Check for duplicate field names.

diff --git a/src/eval.c b/src/eval.c
--- a/src/eval.c
+++ b/src/eval.c
@@ -451,7 +451,6 @@ static dictitem_T *dictitem_copy __ARGS(
 static void dictitem_remove __ARGS((dict_T *dict, dictitem_T *item));
 static dict_T *dict_copy __ARGS((dict_T *orig, int deep, int copyID));
 static long dict_len __ARGS((dict_T *d));
-static dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
 static char_u *dict2string __ARGS((typval_T *tv, int copyID));
 static int get_dict_tv __ARGS((char_u **arg, typval_T *rettv, int evaluate));
 static char_u *echo_string __ARGS((typval_T *tv, char_u **tofree, char_u *numbuf, int copyID));
@@ -7012,7 +7011,7 @@ dict_len(d)
  * If "len" is negative use strlen(key).
  * Returns NULL when not found.
  */
-    static dictitem_T *
+    dictitem_T *
 dict_find(d, key, len)
     dict_T	*d;
     char_u	*key;
diff --git a/src/proto/eval.pro b/src/proto/eval.pro
--- a/src/proto/eval.pro
+++ b/src/proto/eval.pro
@@ -56,6 +56,7 @@ dictitem_T *dictitem_alloc __ARGS((char_
 void dictitem_free __ARGS((dictitem_T *item));
 int dict_add __ARGS((dict_T *d, dictitem_T *item));
 int dict_add_nr_str __ARGS((dict_T *d, char *key, long nr, char_u *str));
+dictitem_T *dict_find __ARGS((dict_T *d, char_u *key, int len));
 char_u *get_dict_string __ARGS((dict_T *d, char_u *key, int save));
 long get_dict_number __ARGS((dict_T *d, char_u *key));
 char_u *get_function_name __ARGS((expand_T *xp, int idx));
diff --git a/src/tag.c b/src/tag.c
--- a/src/tag.c
+++ b/src/tag.c
@@ -3771,7 +3771,8 @@ expand_tags(tagnames, pat, num_file, fil
 static int add_tag_field __ARGS((dict_T *dict, char *field_name, char_u *start, char_u *end));
 
 /*
- * Add a tag field to the dictionary "dict"
+ * Add a tag field to the dictionary "dict".
+ * Return OK or FAIL.
  */
     static int
 add_tag_field(dict, field_name, start, end)
@@ -3783,6 +3784,17 @@ add_tag_field(dict, field_name, start, e
     char_u	buf[MAXPATHL];
     int		len = 0;
 
+    /* check that the field name doesn't exist yet */
+    if (dict_find(dict, (char_u *)field_name, -1) != NULL)
+    {
+	if (p_verbose > 0)
+	{
+	    verbose_enter();
+	    smsg((char_u *)_("Duplicate field name: %s"), field_name);
+	    verbose_leave();
+	}
+	return FAIL;
+    }
     if (start != NULL)
     {
 	if (end == NULL)
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -682,6 +682,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    443,
+/**/
     442,
 /**/
     441,