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Part of the magic of exception handling is that you can pop from normal program flow into the appropriate exception handler. Doing so wouldn’t be useful, however, if things weren’t cleaned up properly as the exception was thrown. C++ exception handling guarantees that as you leave a scope, all objects in that scopewhose constructors have been completed will have destructors called..   std::string toString() const;.   return;.   SieveTest t;.     test_(strings[5] == “sense”);. #include.   typedef Honey snack_type;.   ifstream in(fname);.   ~Triangle() { cout<< "~Triangle\n"; }. class Security {.     return myData;.   builder->buildRack();.     OpenObserver(Hummingbird* h) : parent(h) {}. Often you must also ensure that non-task objects stay alive as long as tasks need them. Otherwise, it’s easy for objects that are used by tasks to go out of scope before those tasks are completed. If this happens, the tasks will try to access illegal storage and will cause program faults. Here’s a simple example:. #include “zthread/Thread.h”.