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patch 8.1.1720: crash with very long %[] pattern

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Problem:    Crash with very long %[] pattern. (Reza Mirzazade farkhani)
Solution:   Check for reg_toolong. (closes #4703)
This commit is contained in:
Bram Moolenaar
2019-07-20 18:56:06 +02:00
parent 331bafd481
commit 2a5b52758b
3 changed files with 17 additions and 0 deletions
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9
src/testdir/test_regexp_utf8.vim
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@@ -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