This revision comprises a patch that fixes potential access to dangling
pointers, and one that plugs a bunch of memory leaks in the tests.
Fix dangling pointers
std::vector gives zero guarantees that pointers to its elements remain
valid when the vector's size changes. In particular, pushing new
elements into the vector may trigger reallocation of the underlying heap
Consequently, Event::delegate() needs to ensure that any modifications
to the d->attendees vector are performed before pointers to its elements
are taken and collected.
Found with Valgrind.
Fix use-after-free bug
QByteArray::fromRawData() does not copy the contents of the source
buffer. If the resulting QByteArray object lives longer than the source
buffer, we run into use-after-free problems.
In this particular instance, the source data resides in a temporary