Problems with UnityWebRequest + Https + IL2CPP on Windows

Hi there,

I spent all day troubleshooting this to try and provide a good test case.

We are playing with the new IL2CPP scripting engine for Windows, and in most cases it works amazing!

Except when you try to close the app, it crashes and hangs. You have to use the TaskManager to force quit the app.

I tried making a Visual Studio project to see if I could debug it, and some exceptions occurred in the TLS/SSL encryption classes.

Trial and error revealed that if we prevent the game from making any https:// webrequests then (for the most part) the app closes normally. It is worth pointing out that we successfully load AssetBundles fine over Https. And when I tried creating a specific test case (http://google.com vs https://google.com) the game crashed in both cases. I suspect the http site is redirecting to https.

Also the game closes fine using the Mono .Net 2.0 scripting engine. I only get the lockup trying to close or Application.Quit() under IL2CPP.

Searching the forums, I found issues reported with TLS, but nothing under IL2CPP.

Is this something you have seen reported before?

Thanks,
Matt

 

Hi there,

Please pull down the test project here.
https://www.dropbox.com/s/aikbtr4ro2koyt3/unitywebrequest-test.zip?dl=0

This is a simple scene that runs about 6 lines of code when you click the "Do Test" button to start a coroutine and use a UnityWebRequest to pull down the contents of http://google.com (not even https). If you build this app for Windows using the IL2CPP backend, it crashes when you try to exit the app.

I've upgraded to the latest 2018.2.0b2 just to make sure this is still an issue.

Thanks,
Matt

 

Submitted as a bug through the Editor too.

 

Same result here, works fine with Mono but hangs on closing with IL2CPP. In my case I'm only getting the problem when I use a CertificateHandler on the UnityWebRequest. Apologies if this relates to something else.

 

Submitted just now, thanks.