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vim-patch:8.0.0542: getpos() can return a negative line number (#8580)

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Problem:    getpos() can return a negative line number. (haya14busa)
Solution:   Handle a zero topline and botline. (closes vim/vim#1613)
a1d5fa65bc
This commit is contained in:
Jan Edmund Lazo
2018-06-19 04:50:52 -04:00
committed by Justin M. Keyes
parent b148213366
commit 3c24a6c317
2 changed files with 9 additions and 4 deletions
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7
src/nvim/eval.c
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@@ -17838,11 +17838,14 @@ pos_T *var2fpos(const typval_T *const tv, const int dollar_lnum,
pos.col = 0;
if (name[1] == '0') { /* "w0": first visible line */
update_topline();
pos.lnum = curwin->w_topline;
// In silent Ex mode topline is zero, but that's not a valid line
// number; use one instead.
pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1;
return &pos;
} else if (name[1] == '$') { /* "w$": last visible line */
validate_botline();
pos.lnum = curwin->w_botline - 1;
// In silent Ex mode botline is zero, return zero then.
pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0;
return &pos;
}
} else if (name[0] == '$') { /* last column or line */