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patch 7.4.1051

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Problem:    Segfault when unletting "count".
Solution:   Check for readonly and locked first. (Dominique Pelle)
            Add a test.
This commit is contained in:
Bram Moolenaar
2016-01-04 22:05:24 +01:00
parent c71982b239
commit af8af8bfac
4 changed files with 44 additions and 12 deletions
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27
src/eval.c
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@@ -3737,24 +3737,27 @@ do_unlet(name, forceit)
ht = find_var_ht(name, &varname);
if (ht != NULL && *varname != NUL)
{
if (ht == &globvarht)
d = &globvardict;
else if (current_funccal != NULL
&& ht == &current_funccal->l_vars.dv_hashtab)
d = &current_funccal->l_vars;
else
{
di = find_var_in_ht(ht, *name, (char_u *)"", FALSE);
d = di->di_tv.vval.v_dict;
}
hi = hash_find(ht, varname);
if (!HASHITEM_EMPTY(hi))
{
di = HI2DI(hi);
if (var_check_fixed(di->di_flags, name, FALSE)
|| var_check_ro(di->di_flags, name, FALSE)
|| tv_check_lock(d->dv_lock, name, FALSE))
|| var_check_ro(di->di_flags, name, FALSE))
return FAIL;
if (ht == &globvarht)
d = &globvardict;
else if (current_funccal != NULL
&& ht == &current_funccal->l_vars.dv_hashtab)
d = &current_funccal->l_vars;
else
{
di = find_var_in_ht(ht, *name, (char_u *)"", FALSE);
d = di->di_tv.vval.v_dict;
}
if (d == NULL || tv_check_lock(d->dv_lock, name, FALSE))
return FAIL;
delete_var(ht, hi);
return OK;
}