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12.2: fork() causing getline() to repeat stdin endlessly



I have a small program (extracted from a big program) which reads and prints input lines using a loop of getline() calls.  The real input lines are all expected to be 52 characters long (+1 for the newline => 53), that's what my example data for the small program looks like.  If there is no fork() in the loop, it works fine.  Inside the loop if I do a fork() of a child which immediately exits (no exec) and waitpid() for it, then the program loops forever repeating the beginning portion of stdin.

I have no idea what package to report the problem against, though it doesn't seem to be gcc as I have tried both gcc12 (which comes with debian) and gcc13 (which I installed manually).

Also, will "reportbug" allow me to attach the program and example input to the bug report?  Should I post them here?

Thanks.


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