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vim-patch:9.0.1189: invalid memory access with folding and using "L" (#21787)

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Problem:    Invalid memory access with folding and using "L".
Solution:   Prevent the cursor from moving to line zero.

232bdaaca9

Co-authored-by: Bram Moolenaar <Bram@vim.org>
This commit is contained in:
zeertzjq 2023-01-14 07:02:45 +08:00 committed by GitHub
parent fd3d30a22c
commit b884d0b370
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 11 additions and 1 deletions
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4
src/nvim/normal.c
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@ -3645,7 +3645,9 @@ static void nv_scroll(cmdarg_T *cap)
&& curwin->w_cursor.lnum > curwin->w_topline; n--) { && curwin->w_cursor.lnum > curwin->w_topline; n--) {
(void)hasFolding(curwin->w_cursor.lnum, (void)hasFolding(curwin->w_cursor.lnum,
&curwin->w_cursor.lnum, NULL); &curwin->w_cursor.lnum, NULL);
curwin->w_cursor.lnum--; if (curwin->w_cursor.lnum > curwin->w_topline) {
curwin->w_cursor.lnum--;
}
} }
} else { } else {
curwin->w_cursor.lnum -= (linenr_T)cap->count1 - 1; curwin->w_cursor.lnum -= (linenr_T)cap->count1 - 1;

8
src/nvim/testdir/test_fold.vim
View File

@ -1475,4 +1475,12 @@ func Test_sort_closed_fold()
bwipe! bwipe!
endfunc endfunc
func Test_indent_with_L_command()
" The "L" command moved the cursor to line zero, causing the text saved for
" undo to use line number -1, which caused trouble for undo later.
new
sil! norm 8R V{zf8=Lu
bwipe!
endfunc
" vim: shiftwidth=2 sts=2 expandtab " vim: shiftwidth=2 sts=2 expandtab