updated for version 7.4.100

Problem:    NFA regexp doesn't handle backreference correctly. (Ryuichi
            Hayashida, Urtica Dioica)
Solution:   Always add NFA_SKIP, also when it already exists at the start
            position.

src/regexp_nfa.c

@@ -4278,7 +4278,7 @@ addstate(l, state, subs_arg, pim, off)
 	     * endless loop for "\(\)*" */
 
 	default:
-	    if (state->lastlist[nfa_ll_index] == l->id)
+	    if (state->lastlist[nfa_ll_index] == l->id && state->c != NFA_SKIP)
 	    {
 		/* This state is already in the list, don't add it again,
 		 * unless it is an MOPEN that is used for a backreference or

src/testdir/test64.in

@@ -406,6 +406,7 @@ STARTTEST
 :call add(tl, [2, '^.*\.\(.*\)/.\+\(\1\)\@<!$', 'foo.bat/foo.bat'])
 :call add(tl, [2, '^.*\.\(.*\)/.\+\(\1\)\@<=$', 'foo.bat/foo.bat', 'foo.bat/foo.bat', 'bat', 'bat'])
 :call add(tl, [2, '\\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}', '2013-06-27${0}', '${0}', '0'])
+:call add(tl, [2, '^\(a*\)\1$', 'aaaaaaaa', 'aaaaaaaa', 'aaaa'])
 :"
 :"""" Look-behind with limit
 :call add(tl, [2, '<\@<=span.', 'xxspanxx<spanyyy', 'spany'])

src/testdir/test64.ok

@@ -944,6 +944,9 @@ OK 2 - ^.*\.\(.*\)/.\+\(\1\)\@<=$
 OK 0 - \\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}
 OK 1 - \\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}
 OK 2 - \\\@<!\${\(\d\+\%(:.\{-}\)\?\\\@<!\)}
+OK 0 - ^\(a*\)\1$
+OK 1 - ^\(a*\)\1$
+OK 2 - ^\(a*\)\1$
 OK 0 - <\@<=span.
 OK 1 - <\@<=span.
 OK 2 - <\@<=span.

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    100,
 /**/
     99,
 /**/