c++ - Cleaning up a stack of pointers -

i'm having few problem cleaning stack of pointers. in below line delete crashes: "memory fault/segmentation fault".

std::stack<reports*> stack; while(db.fetch()) {     reports* report = new report(db);     qthreadpool::globalinstance()->start(report);     stack.push(report); } while( qthreadpool::globalinstance()->activatethreadcount() != 0 );  while( !stack.empty() ) {     delete stack.top();     stack.pop(); } 

the context of code think not relevant. except that: db passed reference report constructor, copy necessary current row data non pointer members. can give me hint ?

edit:

self answer:

ok touch god lights after writing question.

by default

qthreadpool::globalinstance()->start(report); 

will take ownership of object. adding following line in loop solves problem:

report->setautodelete(false); 

or symply not cleaning up... myself , let qt it.

ok touch god lights after writing question.

by default

qthreadpool::globalinstance()->start(report); 

will take ownership of object. adding following line in loop solves problem:

report->setautodelete(false); 

or symply not cleaning up... myself , let qt it.