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If no matching handler is found, the function std::terminate() is called; whether or not the stack is unwound before this call to std::terminate() is implementation-defined.

The default terminate handler called by std::terminate() calls std::abort(), which abnormally terminates the process. When std::abort() is called, or if the implementation does not unwind the stack prior to calling std::terminate(), destructors for objects may not be called and external resources can be left in an indeterminate state. Abnormal process termination is the typical vector for denial-of-service attacks. For more information on implicitly calling std::terminate(), see ERR50-CPP. Do not abruptly terminate the program.

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