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patch 8.2.2121: internal error when using \ze before \zs in a pattern

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Problem:    Internal error when using \ze before \zs in a pattern.
Solution:   Check the end is never before the start. (closes #7442)
This commit is contained in:
Bram Moolenaar
2020-12-09 16:36:04 +01:00
parent 730677a0da
commit a7a691cc14
4 changed files with 43 additions and 0 deletions
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7
src/testdir/test_regexp_latin.vim
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@@ -911,6 +911,13 @@ func Test_start_end_of_buffer_match()
bwipe!
endfunc
func Test_ze_before_zs()
call assert_equal('', matchstr(' ', '\%#=1\ze \zs'))
call assert_equal('', matchstr(' ', '\%#=2\ze \zs'))
call assert_equal(repeat([''], 10), matchlist(' ', '\%#=1\ze \zs'))
call assert_equal(repeat([''], 10), matchlist(' ', '\%#=2\ze \zs'))
endfunc
" Check for detecting error
func Test_regexp_error()
call assert_fails("call matchlist('x x', '\\%#=1 \\zs*')", 'E888:')