Invalid packet header 0x1ffffff91ffffffa0ffffff9d == .... == 26321053

[ccorcos]

When trying to open the dev tools tools, I get this error and it immediately closes:

❯❯❯ ios_webkit_debug_proxy
Listing devices on :9221
Connected :9222 to 🍉 (6a028994cf281be807bf80c5557c3f2eb3fbb8b0)
Invalid packet header 0x1ffffff91ffffffa0ffffff9d == .... == 26321053
Disconnected :9222 from 🍉 (6a028994cf281be807bf80c5557c3f2eb3fbb8b0)

[artygus]

hi @ccorcos the error occurs because message from webinspector is larger than 16mb, which is a bot suspicious. are you debugging any particular page or is it an app?

could you please attach output of ios_webkit_debug_proxy -d?

[ccorcos]

Interesting. Well, I have an application with 39MB unminified javascript file (with source maps, etc)... Any way to override this restriction?

https://gist.github.com/ccorcos/aab47a99b29b9dd2d8e415be191ed487

[artygus]

@ccorcos pushed changes, can you confirm has been fixed for you?

brew reinstall -s ios-webkit-debug-proxy

[ccorcos]

I had to run brew install --HEAD ios-webkit-debug-proxy to install ios-webkit-debug-proxy HEAD-a724e10.

Still disconnected though: https://gist.github.com/ccorcos/096940a1e342cc4468b31801b2ef37eb

[artygus]

Well, I see no Invalid packet header in output log. Not sure what could go wrong this time, let me craft a sample with heavy js and I'll get back to you

[artygus]

can't reproduce the disconnection thing, would be great if you could provide reproduce steps

[ccorcos]

Hmm. When I open the production version of the app <www.notion.so> in iOS Safari, I don't get the disconnect error. However, it doesn't seem fully functional. The console doesn't work and click to select element thing doesn't work either. Is that expected?

As for a reproduction, I'll have to try to set some things up. I'm async loading some more large JS files right after startup, so that could be it.

[artygus]

safari/chrome dev tools protocols diverged a lot, please see https://github.com/google/ios-webkit-debug-proxy#using-with-devtools for workarounds

[ccorcos]

I see. Well let me see what I can recreate for you. Thanks for the help.

[ccorcos]

Just a thought, could the issue be large source maps? I'd imagine those are expensive to load, especially in a 39MB JS file.

[artygus]

Can't be 100% sure, but technically they're just another asset file. Crafted 28MB javascript with source maps, still no luck. The only achievement hanging dev tools page so far 🙂

[ccorcos]

Hmm. Turning sourcemaps off seems to have fixed the problem. Let me see if I can minimally reproduce.

[ccorcos]

More progress: 82MB generate js file with sourcemaps worked.