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st.c: bin might be zero

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When EMPTY_OR_DELETED_BIN_P(bin) is true, it is a wrong idea to
subtract ENTRY_BASE from it.  Delay doing so until we are sure to be
safe.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65635 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
shyouhei 2018-11-08 09:52:14 +00:00
parent e226772ab6
commit e3cfb1f3ca
1 changed files with 1 additions and 1 deletions
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2
st.c
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@ -2184,13 +2184,13 @@ st_rehash_indexed(st_table *tab)
ind = hash_bin(p->hash, tab); ind = hash_bin(p->hash, tab);
for(;;) { for(;;) {
st_index_t bin = get_bin(bins, size_ind, ind); st_index_t bin = get_bin(bins, size_ind, ind);
st_table_entry *q = &tab->entries[bin - ENTRY_BASE];
if (EMPTY_OR_DELETED_BIN_P(bin)) { if (EMPTY_OR_DELETED_BIN_P(bin)) {
/* ok, new room */ /* ok, new room */
set_bin(bins, size_ind, ind, i + ENTRY_BASE); set_bin(bins, size_ind, ind, i + ENTRY_BASE);
break; break;
} }
else { else {
st_table_entry *q = &tab->entries[bin - ENTRY_BASE];
DO_PTR_EQUAL_CHECK(tab, q, p->hash, p->key, eq_p, rebuilt_p); DO_PTR_EQUAL_CHECK(tab, q, p->hash, p->key, eq_p, rebuilt_p);
if (EXPECT(rebuilt_p, 0)) if (EXPECT(rebuilt_p, 0))
return TRUE; return TRUE;