nvda

f8852a84 - Wait until GUI exits before starting new NVDA instance from installer (#12431)

Wait until GUI exits before starting new NVDA instance from installer (#12431) NVDA (usually) crashes after a successful install. This occurs directly after "NVDA exit" is logged, and happens during the system exit process. Debugging the crash dump in #12421 finds that a window is processing an activate event after the wx app has been destroyed. We know that: the installer crashes at the end, when WM_QUIT is sent from another NVDA instance the installer only crashes for non-silent installs, otherwise appveyor would be crashing regularly I've found that: the installer exits normally when another NVDA instance is started before the install finishes running subsequent instances of NVDA exits the running instance using WM_QUIT without crashing Description of how this pull request fixes the issue: If we exit the GUI before starting the new instance of NVDA, then the new instance will not use WM_QUIT to exit the GUI. This PR adds a handler to start a new NVDA instance, to the NVDA exit event, after the wx mainloop is exited safely.