New submission from Nick Coghlan: Issue 29988 covers the fact that with the default SIGINT handler installed, a poorly timed Ctrl-C can lead to context managers failing to even start running their __(a)exit__ methods, let alone complete them.
For the asynchronous case, the problem is even worse, as the *event loop* may be interrupted at arbitrary points if the default SIGINT handler is left in place. To handle this robustly, it's desirable to make it easy to switch event-driven programs over to cooperative Ctrl-C handling by installing an asyncio SIGINT handler while the event loop is running, rather than leaving the default SIGINT handler in place. (Note: while installing a cooperative SIGINT handler will enable more robust event-loop managed resource cleanup, it will have the downside that Ctrl-C won't be able to interrupt a coroutine that has incorrectly blocked the main thread) ---------- components: Library (Lib) messages: 301619 nosy: giampaolo.rodola, gregory.p.smith, haypo, ncoghlan, njs, yselivanov priority: normal severity: normal stage: needs patch status: open title: asyncio should make it easy to enable cooperative SIGINT handling type: behavior versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue31387> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
