gcc: Exception handling

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1 5.2 Exception Handling
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1    * 'In the situation where no matching handler is found, it is
1      implementation-defined whether or not the stack is unwound before
1      std::terminate() is called (C++98 15.5.1).'
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1      The stack is not unwound before std::terminate is called.
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1  c Copyright (C) 1988-2018 Free Software Foundation, Inc.
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