patch 8.1.0935: old regexp engine may use invalid buffer
Problem: Old regexp engine may use invalid buffer for 'iskeyword' or
uninitialized buffer pointer. (Kuang-che Wu)
Solution: Set rex.reg_buf when compiling the pattern. (closes #3972)
diff --git a/src/testdir/test_regexp_latin.vim b/src/testdir/test_regexp_latin.vim
index 09104a1..d63b4f9 100644
--- a/src/testdir/test_regexp_latin.vim
+++ b/src/testdir/test_regexp_latin.vim
@@ -104,3 +104,19 @@
s/^/[[=
call assert_equal(1, search(getline(1)))
endfunc
+
+func Test_rex_init()
+ set noincsearch
+ set re=1
+ new
+ setlocal iskeyword=a-z
+ call setline(1, ['abc', 'ABC'])
+ call assert_equal(1, search('[[:keyword:]]'))
+ new
+ setlocal iskeyword=A-Z
+ call setline(1, ['abc', 'ABC'])
+ call assert_equal(2, search('[[:keyword:]]'))
+ bwipe!
+ bwipe!
+ set re=0
+endfunc