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Thus, the following scenarios can result in undefined behavior:

•  Receiving input from a stream directly following an output to that stream without an intervening call to std::basic_filebuf<T>::seekoff() if the file is not at end-of-file
•  Outputting to a stream after receiving input from that stream without a call to std::basic_filebuf<T>::seekoff() if the file is not at end-of-file

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Alternately inputting and outputting from a stream without an intervening flush or positioning call is undefined behavior.

Automated Detection

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Bibliography

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