cefclient aborted popup keeps application from terminating

[rocknowradio]

Describe the bug
If FileDialogHandler::OnFileDialog gets invoked, cefclient does not terminate.

To Reproduce
Steps to reproduce the behavior:

1. Download Sample Application (127.3.5+g114ea2a 127.0.6533.120) Windows x64.
2. Open cefclient using cefclient --url=http://egghunter.in/safepay/file.html --enable-chrome-runtime (--disable-chrome-runtime yields the same result).
3. Click on the Click Here... image. This will invoke a file open dialog (in the background will attempt to also open a new popup, but even without this the result is the same).
4. Close the file dialog (either dismiss or pick a file).
5. Close cefclient.

Expected behavior
cefclient should close normally.

Screenshots
Not needed

Versions (please complete the following information):

• OS: Windows 10 x64
• CEF Version: 127.3.5

Additional context
Does the problem reproduce with the cefclient or cefsimple sample application at the same version?
cefclient: Yes
cefsimple: No

Does the problem reproduce with Google Chrome at the same version?
No

[magreenblatt]

Reproduces for me with M130 on Windows 11. The window closes but processes are still running in Task Manager.

[magreenblatt]

This does not appear to reproduce with the file open dialogs from https://tests/dialogs

[magreenblatt]

in the background will attempt to also open a new popup

Looks like cefclient's popup handling is the issue. The problem is avoided by running with --use-default-popup

It would be useful to test if calling preventDefault() and/or preventImmediatePropagation() in the onclick handler (to avoid the popup) also avoids the problem.

[rocknowradio]

I will debug all of these. I plan to upgrade to CEF 129 and this is on the regression list.