Read/Write after EOF marker (The GNU Fortran Compiler)

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5.1.21 Read/Write after EOF marker ¶

Some legacy codes rely on allowing READ or WRITE after the EOF file marker in order to find the end of a file. GNU Fortran normally rejects these codes with a run-time error message and suggests the user consider BACKSPACE or REWIND to properly position the file before the EOF marker. As an extension, the run-time error may be disabled using -std=legacy.