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patch 8.2.2272: Vim9: extend() can violate the type of a variable

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Problem:    Vim9: extend() can violate the type of a variable.
Solution:   Add the type to the dictionary or list and check items against it.
            (closes #7593)
This commit is contained in:
Bram Moolenaar
2021-01-02 15:41:03 +01:00
parent 3e0107ea16
commit aa210a3aec
11 changed files with 149 additions and 13 deletions
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9
src/list.c
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@@ -270,6 +270,7 @@ list_free_list(list_T *l)
if (l->lv_used_next != NULL)
l->lv_used_next->lv_used_prev = l->lv_used_prev;
free_type(l->lv_type);
vim_free(l);
}
@@ -689,13 +690,17 @@ list_append_number(list_T *l, varnumber_T n)
/*
* Insert typval_T "tv" in list "l" before "item".
* If "item" is NULL append at the end.
* Return FAIL when out of memory.
* Return FAIL when out of memory or the type is wrong.
*/
int
list_insert_tv(list_T *l, typval_T *tv, listitem_T *item)
{
listitem_T *ni = listitem_alloc();
listitem_T *ni;
if (l->lv_type != NULL && l->lv_type->tt_member != NULL
&& check_typval_type(l->lv_type->tt_member, tv, 0) == FAIL)
return FAIL;
ni = listitem_alloc();
if (ni == NULL)
return FAIL;
copy_tv(tv, &ni->li_tv);