(Pseudo Console) Application Error 0xc0000142 pops up when the parent is killed. How to avoid this popup?

[asmichi]

Hello, I am using pseudo consoles in my library to (a) run a child process in a UTF-8 console and (b) send Ctrl+C.

Suppose the parent is a console app, continuously launches child processes attached to pseudo consoles... and killed with the [x] button or something immediately after launching a child process. Then its leftover child process sometimes tries to connect to a closed pseudo console and pops up the "Application Error" (0xc0000142) dialog as described in the document:

Closing the pseudoconsole session while the hosted process is still starting up and connecting can result in an error dialog being shown by the client application. The same error dialog is shown if the hosted process is given an invalid pseudoconsole handle for startup. To the hosted process initialization code, the two circumstances are identical. The pop-up dialog from the hosted client application on failure will read 0xc0000142 with a localized message detailing failure to initialize.

Here is an artificial repro of the popup: https://gist.github.com/asmichi/a37622e5cb7117e2870df68f750cb69b .

Is there any way to avoid this popup?

It seems to work to kill the child process on parent termination with JOB_OBJECT_LIMIT_KILL_ON_JOB_CLOSE (included in the #if 0 section of the repro). Because the parent is forcibly killed, forcibly killing the children can make sense.

However, if there is a better solution, I'd really appreciate your help.

(Also mentioned in: #4132 (comment))