updated for version 7.3.756

Problem:    A location list can get a wrong count in :lvimgrep.
Solution:   Check if the list was changed by autocommands. (mostly by
            Christian Brabandt)

src/quickfix.c

@@ -3109,6 +3109,9 @@ ex_vimgrep(eap)
     char_u	*p;
     int		fi;
     qf_info_T	*qi = &ql_info;
+#ifdef FEAT_AUTOCMD
+    qfline_T	*cur_qf_start;
+#endif
     qfline_T	*prevp = NULL;
     long	lnum;
     buf_T	*buf;
@@ -3218,6 +3221,12 @@ ex_vimgrep(eap)
      * ":lcd %:p:h" changes the meaning of short path names. */
     mch_dirname(dirname_start, MAXPATHL);
 
+#ifdef FEAT_AUTOCMD
+     /* Remeber the value of qf_start, so that we can check for autocommands
+      * changing the current quickfix list. */
+    cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
+#endif
+
     seconds = (time_t)0;
     for (fi = 0; fi < fcount && !got_int && tomatch > 0; ++fi)
     {
@@ -3273,6 +3282,28 @@ ex_vimgrep(eap)
 	    /* Use existing, loaded buffer. */
 	    using_dummy = FALSE;
 
+#ifdef FEAT_AUTOCMD
+	if (cur_qf_start != qi->qf_lists[qi->qf_curlist].qf_start)
+	{
+	    int idx;
+
+	    /* Autocommands changed the quickfix list.  Find the one we were
+	     * using and restore it. */
+	    for (idx = 0; idx < LISTCOUNT; ++idx)
+		if (cur_qf_start == qi->qf_lists[idx].qf_start)
+		{
+		    qi->qf_curlist = idx;
+		    break;
+		}
+	    if (idx == LISTCOUNT)
+	    {
+		/* List cannot be found, create a new one. */
+		qf_new_list(qi, *eap->cmdlinep);
+		cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
+	    }
+	}
+#endif
+
 	if (buf == NULL)
 	{
 	    if (!got_int)
@@ -3324,6 +3355,9 @@ ex_vimgrep(eap)
 		if (got_int)
 		    break;
 	    }
+#ifdef FEAT_AUTOCMD
+	    cur_qf_start = qi->qf_lists[qi->qf_curlist].qf_start;
+#endif
 
 	    if (using_dummy)
 	    {

src/version.c

@@ -725,6 +725,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    756,
 /**/
     755,
 /**/