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-rw-r--r--src/nvim/option.c5
-rw-r--r--test/functional/legacy/options_spec.lua5
2 files changed, 9 insertions, 1 deletions
diff --git a/src/nvim/option.c b/src/nvim/option.c
index 04bd968ac8..02e7aeb98b 100644
--- a/src/nvim/option.c
+++ b/src/nvim/option.c
@@ -2991,7 +2991,7 @@ 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) {
@@ -3370,6 +3370,9 @@ 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;
diff --git a/test/functional/legacy/options_spec.lua b/test/functional/legacy/options_spec.lua
index 023cdd4ae1..bd14f3bc53 100644
--- a/test/functional/legacy/options_spec.lua
+++ b/test/functional/legacy/options_spec.lua
@@ -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)