lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

My program encounter a crash.
From the dump, they are same.
But I don't have a way to recreate this buy.
I am using lua 5.1,not the recently version,but I compare the two version. the ltable.c have only modify one line.
static TValue *newkey (lua_State *L, Table *t, const TValue *key) {
  Node *mp = mainposition(t, key);
  if (!ttisnil(gval(mp)) || mp == dummynode) {
    Node *othern;
    Node *n = getfreepos(t);  /* get a free place */
    if (n == NULL) {  /* cannot find a free place? */
      rehash(L, t, key);  /* grow table */
      return luaH_set(L, t, key);  /* re-insert key into grown table */
    lua_assert(n != dummynode);
    othern = mainposition(t, key2tval(mp));
    if (othern != mp) {  /* is colliding node out of its main position? */
      /* yes; move colliding node into free position */
      while (gnext(othern) != mp) othern = gnext(othern);  /* find previous */
      gnext(othern) = n;  /* redo the chain with `n' in place of `mp' */
      *n = *mp;  /* copy colliding node into free pos. (mp->next also goes) */
      gnext(mp) = NULL;  /* now `mp' is free */
    else {  /* colliding node is in its own main position */
      /* new node will go into free position */
      gnext(n) = gnext(mp);  /* chain new position */
      gnext(mp) = n;
      mp = n;
  gkey(mp)->value = key->value; gkey(mp)->tt = key->tt;
  luaC_barriert(L, t, key);
  return gval(mp);
crash in the red line.
I have analysed the dump file.
othern is 88 at this condition.
and the call stack is:
luaV_settable while luaH_set
luaV_execute while OP_MOD
Thank you very much.