commit 338e47fdfdf0d918dae50a5cbf0cf4f7be45b4f0
author Bram Moolenaar <Bram@vim.org> Tue Dec 19 11:55:26 2017 +0100
committer Bram Moolenaar <Bram@vim.org> Tue Dec 19 11:55:26 2017 +0100
tree 77167ff3898adcfed642be034f6840e68aa4d8bf
parent 132f75255ecea17ff621f71236568c5d8d8e0163

patch 8.0.1410: hang when using count() with an empty string

Problem:    Hang when using count() with an empty string.
Solution:   Return zero for an empty string. (Dominique Pelle, closes #2465)

src/testdir/test_functions.vim

diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index d904013..20e4280 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -692,6 +692,7 @@
   call assert_equal(0, count("foo", "O"))
   call assert_equal(2, count("foo", "O", 1))
   call assert_equal(2, count("fooooo", "oo"))
+  call assert_equal(0, count("foo", ""))
 endfunc
 
 func Test_changenr()