Bram, Calling setpos() with a number <= 0 for the col argument results in a negative value for curwin->w_cursor.col, which can cause various commands that rely on the col value to crash Vim.
A simple example is:
$ echo foo > foo
$ vim -u NONE -c 'call setpos(".", [0, 1, 0, 0])' -c 'normal x' foo
This is due to f_setpos blindly decrementing the col value it gets back
from list2fpos. Since there may be other places which can cause col to
be negative, the attached patch updates check_cursor_col to ensure that
curwin->w_cursor.col is always >= 0, similar to check_cursor_lnum's
behavior.
--
James
GPG Key: 1024D/61326D40 2003-09-02 James Vega <[email protected]>
diff --git a/src/misc2.c b/src/misc2.c
index 5fc64bb..2dbf486 100644
--- a/src/misc2.c
+++ b/src/misc2.c
@@ -528,6 +528,8 @@ check_cursor_col()
#endif
}
}
+ if (curwin->w_cursor.col < 0)
+ curwin->w_cursor.col = 0;
#ifdef FEAT_VIRTUALEDIT
/* If virtual editing is on, we can leave the cursor on the old position,
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