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fix(options): disallow empty 'fdc' and 'scl' (#16776)

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Empty string values for these options aren't actually allowed, but
check_opt_strings allows empty string options.

It so happens that 'scl' handles empty string like "auto", but empty 'fdc'
causes glitchiness (win_fdccol_count returns an incorrect value).

Just disallow empty string values for these options completely.
This commit is contained in:
github-actions[bot] 2021-12-24 22:38:15 -07:00 committed by GitHub
parent 09306f07c4
commit 37a00be7c0
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2 changed files with 9 additions and 1 deletions
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5
src/nvim/option.c
View File

@ -2953,7 +2953,7 @@ ambw_end:
}
} else if (varp == &curwin->w_p_fdc || varp == &curwin->w_allbuf_opt.wo_fdc) {
// 'foldcolumn'
if (check_opt_strings(*varp, p_fdc_values, false) != OK) {
if (**varp == NUL || check_opt_strings(*varp, p_fdc_values, false) != OK) {
errmsg = e_invarg;
}
} else if (varp == &p_pt) {
@ -3332,6 +3332,9 @@ static int int_cmp(const void *a, const void *b)
/// @return OK when the value is valid, FAIL otherwise
int check_signcolumn(char_u *val)
{
if (*val == NUL) {
return FAIL;
}
// check for basic match
if (check_opt_strings(val, p_scl_values, false) == OK) {
return OK;

5
test/functional/legacy/options_spec.lua
View File

@ -83,4 +83,9 @@ describe('set', function()
Press ENTER or type command to continue^ |
]])
end)
it('foldcolumn and signcolumn to empty string is disallowed', function()
matches('E474: Invalid argument: fdc=', exc_exec('set fdc='))
matches('E474: Invalid argument: scl=', exc_exec('set scl='))
end)
end)