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-rw-r--r--src/testdir/test_regexp_utf8.vim9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/testdir/test_regexp_utf8.vim b/src/testdir/test_regexp_utf8.vim
index 98b9e73de6..19ff882be6 100644
--- a/src/testdir/test_regexp_utf8.vim
+++ b/src/testdir/test_regexp_utf8.vim
@@ -206,3 +206,12 @@ func Test_large_class()
call assert_equal(1, "\u3042" =~# '[\u3000-\u4000]')
set re=0
endfunc
+
+func Test_optmatch_toolong()
+ set re=1
+ " Can only handle about 8000 characters.
+ let pat = '\\%[' .. repeat('x', 9000) .. ']'
+ call assert_fails('call match("abc def", "' .. pat .. '")', 'E339:')
+ set re=0
+endfunc
+