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Not all exceptions can be caught, even with careful use of function-try-blocks. The C++ Standard, [except.handle], paragraph 13 [ISO/IEC 14882-2014], states:

Exceptions thrown in destructors of objects with static storage duration or in constructors of namespace scope objects with static storage duration are not caught by a function-try-block on main() . Exceptions thrown in destructors of objects with thread storage duration or in constructors of namespace-scope objects with thread storage duration are not caught by a function-try-block on the initial function of the thread.

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Bibliography

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