QHash::unite() question

[aMan]

Hi,
I have the following code

QHash<Blub, Blab>* firstHash = new QHash..;
QHash<Blub, Blab>* secondHash = new QHash..;
..
firstHash->unite(*secondHash);
// delete secondHash;

QHash<Blub, Blab>* firstHash = new QHash..;
QHash<Blub, Blab>* secondHash = new QHash..;
..
firstHash->unite(*secondHash);
// delete secondHash;

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When I uncomment the delete, than my application crashes. I assume it's because all elements in the secondHash are deleted and not more available in the firstHash.

Is it save to leave the second Hash undeletet? Wouldn't that be a memory leak?