When building Qt Creator 1.3.1 qdoc3 segfaults while processing the documentation. The segfault occurs when "delete tree" is called at the end of processQdocconfFile() in tools/qdoc3/main.cpp. In InnerNode::removeChild() in tools/qdoc3/node.cpp the iterator returned by childMap.find() isn't checked:

QMap<QString, Node *>::Iterator ent = childMap.find( child->name() );
if ( *ent == child )

I replaced the second line by:

if ( ent != childMap.end() && *ent == child )

Now qdoc3 doesn't segfault.

There are two more places in InnerNode::removeChild() where the iterator returned by QMap.find() isn't checked.