cpack.cxx `nullptr` dereference
cpackGenerator = generators.NewGenerator(gen);
if (!cpackGenerator) {
cmCPack_Log(&log, cmCPackLog::LOG_ERROR,
"Cannot initialize CPack generator: " << gen
<< std::endl);
parsed = 0;
}
cpackGenerator->SetTrace(trace); // <-- HERE: As it checked above, `cpackGenerator` can be `nullptr` now