tags 858529 upstream forwarded 858529 https://sourceware.org/bugzilla/show_bug.cgi?id=20598 thanks
* Neil Spring: > if(fork() == 0) { exit(1); } exit flushes the stdio buffers in the child. Upstream concluded that this leads to undefined behavior: | Yes, this is about the exit actually. But reading "2.5.1 | Interaction of File Descriptors and Standard I/O Streams", I think | this is really undefined, because the required action is not | performed before the call to fork, and the correct fix is to use | _exit in the forked child. <https://sourceware.org/bugzilla/show_bug.cgi?id=20598#c2>