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From 65b605665997fad54ef39a93199e305af2fe4d7f Mon Sep 17 00:00:00 2001
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From: Bram Moolenaar <Bram@vim.org>
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Date: Tue, 7 Sep 2021 19:26:53 +0200
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Subject: [PATCH] patch 8.2.3409: reading beyond end of line with invalid utf-8
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character
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Problem: Reading beyond end of line with invalid utf-8 character.
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Solution: Check for NUL when advancing.
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---
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src/regexp_nfa.c | 3 ++-
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src/testdir/test_regexp_utf8.vim | 8 ++++++++
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src/version.c | 2 ++
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3 files changed, 12 insertions(+), 1 deletion(-)
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diff --git a/src/regexp_nfa.c b/src/regexp_nfa.c
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index 9757d7c47..c7db98187 100644
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--- a/src/regexp_nfa.c
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+++ b/src/regexp_nfa.c
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@@ -5664,7 +5664,8 @@ find_match_text(colnr_T startcol, int regstart, char_u *match_text)
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match = FALSE;
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break;
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}
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- len2 += MB_CHAR2LEN(c2);
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+ len2 += enc_utf8 ? utf_ptr2len(rex.line + col + len2)
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+ : MB_CHAR2LEN(c2);
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}
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if (match
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// check that no composing char follows
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diff --git a/src/testdir/test_regexp_utf8.vim b/src/testdir/test_regexp_utf8.vim
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index 9f0ffb9aa..044aeffb6 100644
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--- a/src/testdir/test_regexp_utf8.vim
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+++ b/src/testdir/test_regexp_utf8.vim
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@@ -558,4 +558,12 @@ func Test_match_char_class_upper()
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bwipe!
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endfunc
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+func Test_match_invalid_byte()
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+ call writefile(0z630a.765d30aa0a.2e0a.790a.4030, 'Xinvalid')
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+ new
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+ source Xinvalid
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+ bwipe!
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+ call delete('Xinvalid')
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+endfunc
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+
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" vim: shiftwidth=2 sts=2 expandtab
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--
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2.31.1
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