diff --git a/src/testdir/Makefile b/src/testdir/Makefile
index 667d1e9..4053665 100644
--- a/src/testdir/Makefile
+++ b/src/testdir/Makefile
@@ -4,6 +4,10 @@
 
 VIMPROG = ../vim
 
+# Uncomment this line for using valgrind.
+# The output goes into a file "valgrind.$PID" (sorry, no test number).
+# VALGRIND = valgrind --tool=memcheck --num-callers=15 --logfile=valgrind
+
 SCRIPTS = test1.out test2.out test3.out test4.out test5.out test6.out \
 		test7.out test8.out test9.out test10.out test11.out \
 		test12.out  test13.out test14.out test15.out test17.out \
@@ -15,7 +19,8 @@
 		test43.out test44.out test45.out test46.out test47.out \
 		test48.out test49.out test51.out test52.out test53.out \
 		test54.out test55.out test56.out test57.out test58.out \
-		test59.out test60.out test61.out test62.out test63.out
+		test59.out test60.out test61.out test62.out test63.out \
+		test64.out
 
 SCRIPTS_GUI = test16.out
 
@@ -38,7 +43,7 @@
 
 test1.out: test1.in
 	-rm -f $*.failed tiny.vim small.vim mbyte.vim test.ok X* viminfo
-	$(VIMPROG) -u unix.vim -U NONE --noplugin -s dotest.in $*.in
+	$(VALGRIND) $(VIMPROG) -u unix.vim -U NONE --noplugin -s dotest.in $*.in
 	@/bin/sh -c "if diff test.out $*.ok; \
 		then mv -f test.out $*.out; \
 		else echo; \
@@ -51,7 +56,7 @@
 	cp $*.ok test.ok
 	# Sleep a moment to avoid that the xterm title is messed up
 	@-sleep .2
-	-$(VIMPROG) -u unix.vim -U NONE --noplugin -s dotest.in $*.in
+	-$(VALGRIND) $(VIMPROG) -u unix.vim -U NONE --noplugin -s dotest.in $*.in
 	@/bin/sh -c "if test -f test.out; then\
 		  if diff test.out $*.ok; \
 		  then mv -f test.out $*.out; \
diff --git a/src/testdir/test64.in b/src/testdir/test64.in
new file mode 100644
index 0000000..aa931db
--- /dev/null
+++ b/src/testdir/test64.in
@@ -0,0 +1,52 @@
+Test for regexp patterns.
+
+A pattern that gives the expected result produces OK, so that we know it was
+actually tried.
+
+STARTTEST
+:so small.vim
+:" tl is a List of Lists with:
+:"    regexp pattern
+:"    text to test the pattern on
+:"    expected match (optional)
+:"    expected submatch 1 (optional)
+:"    expected submatch 2 (optional)
+:"    etc.
+:"  When there is no match use only the first two items.
+:let tl = []
+:call add(tl, ['b', 'abcdef', 'b'])
+:call add(tl, ['bc*', 'abccccdef', 'bcccc'])
+:call add(tl, ['bc\{-}', 'abccccdef', 'b'])
+:call add(tl, ['bc\{-}\(d\)', 'abccccdef', 'bccccd', 'd'])
+:call add(tl, ['x', 'abcdef'])
+:"
+:for t in tl
+:  let l = matchlist(t[1], t[0])
+:" check the match itself
+:  if len(l) == 0 && len(t) > 2
+:    $put ='ERROR: pat: \"' . t[0] . '\", text: \"' . t[1] . '\", did not match, expected: \"' . t[2] . '\"'
+:  elseif len(l) > 0 && len(t) == 2
+:    $put ='ERROR: pat: \"' . t[0] . '\", text: \"' . t[1] . '\", match: \"' . l[0] . '\", expected no match'
+:  elseif len(t) > 2 && l[0] != t[2]
+:    $put ='ERROR: pat: \"' . t[0] . '\", text: \"' . t[1] . '\", match: \"' . l[0] . '\", expected: \"' . t[2] . '\"'
+:  else
+:    $put ='OK'
+:  endif
+:  if len(l) > 0
+:"   check all the nine submatches
+:    for i in range(1, 9)
+:      if len(t) <= i + 2
+:        let e = ''
+:      else
+:        let e = t[i + 2]
+:      endif
+:      if l[i] != e
+:        $put ='ERROR: pat: \"' . t[0] . '\", text: \"' . t[1] . '\", submatch ' . i . ': \"' . l[i] . '\", expected: \"' . e . '\"'
+:      endif
+:    endfor
+:  endif
+:endfor
+:/^Results/,$wq! test.out
+ENDTEST
+
+Results of test64:
diff --git a/src/testdir/test64.ok b/src/testdir/test64.ok
new file mode 100644
index 0000000..edd8b42
--- /dev/null
+++ b/src/testdir/test64.ok
@@ -0,0 +1,6 @@
+Results of test64:
+OK
+OK
+OK
+OK
+OK
diff --git a/src/version.c b/src/version.c
index 999621c..e6d62a0 100644
--- a/src/version.c
+++ b/src/version.c
@@ -667,6 +667,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    71,
+/**/
     70,
 /**/
     69,