Hmm.... thanks for pressing this

No problem. I got it wrong first off, which I felt bad about, and ultimately your quest to educate yourself ended up educating me, which IMO is a victory for us both, so thanks right back atchya :-)

Anyway, the posted code looks lot closer to what I would expect. The only glaring issue is basically a nit, in that you need to handle the case of the hv_store() failing. Which is why its normally done like 

HV *hash = newHV();
SV *sv= newSVpv("test", 0);
if (!hv_store( hash, "key", strlen("key"), sv , 0)) {
  /* need to explicitly free the sv if its 
   * not successfully stored in the hash
   */
  SvREFCNT_dec(sv); 
}

[download]

As otherwise if the hv_store fails you will leak....

I guess that this is just sample code so I should overlook the the overuse of strlen but in that sample I'd supply sizes explicitly. Also, be careful, strlen() is unsafe in the core (especially as regards SV's) as strings are allowed to contain embedded nulls.

---
$world=~s/war/peace/g

In reply to Re^7: perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by demerphq
in thread perlembed: mortalize an AV, get "Attempt to free unreferenced scalar" - don't mortalize, leaks memory by edan

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