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When spawned with stderr closed, e.g. by Node.js, which marks its stdio close-on-exec, the main loop's wakeup fd got allocated as fd 2, only to be replaced with /dev/null by detach_from_terminal(). The main loop then spun at 100% CPU polling /dev/null.
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When spawned with stderr closed, e.g. by Node.js, which marks its stdio close-on-exec, the main loop's wakeup fd got allocated as fd 2, only to be replaced with /dev/null by detach_from_terminal(). The main loop then spun at 100% CPU polling /dev/null.