Eryk Sun added the comment: > After enabling `QuickEdit Mode`, then click the console will > suspend the program.
That's not suspending the entire process. It's blocking the thread that writes to the console. The user-mode WriteConsole function is implemented by a synchronous NtDeviceIoControlFile system call. The console (i.e. conhost.exe) is on the other end of the call. It has at least 2 threads -- an input thread that's basically a standard message loop and an output thread for updating and rendering the contents of its active screen buffer. It's a feature that clicking on the console window to copy text causes its output thread to block. This in turn prevents WriteFile in python.exe from completing. That said, I've seen random hangs in the console that are unrelated to the above (e.g. hanging while reflowing text), but not often enough that I bothered to investigate it. There's a lot of new code in the 2nd generation console implementation (ConhostV2.dll) in Windows 10, and the developers are making significant improvements with each update. I'm waiting for the dust to settle. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26744> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
