Word to the wise

[pne]

Don't copy pointers to child objects (has-a relationship) in your operator =; sharing common children this way will bite you when you try to destroy your child objects and they've already been destroyed.

Fortunately, the STL implementation we use replaces internal pointers with "magic" nonsense values after the object is destroyed so you at least get a segfault and notice.

Comments

[timwi.livejournal.com]

The joys of implicit sharing, as done fantastically in Qt :-)