ObjC.protocols is only enumerable at the first time

[ChiChou]

Reproduce the bug:

• frida -U [any app or target]
• [iPhone::WKWebView]-> ObjC.protocols <-- the first time, it works
• [iPhone::WKWebView]-> ObjC.protocols <-- try again, it's empty({})

If you have the name of the protocol, the getter still works

[oleavr]

Whoah, what an embarrassing bug. Thanks for reporting it! ❤️