attach() fails to attach; times out

[une-petite-laitue]

Hi there,

I'm using Frida 14.2.14 against an A13 device running iOS 14.3, which is jailbroken using unc0ver 6.1.1.

I would expect the following code to attach to a running instance of <app>.

import frida

device = frida.get_usb_device()
session = device.attach("App") # uses _pid_of() to find pid of app specified by name

Doing this fails to attach to on the device. Instead, I receive the following error:

frida.TransportError: timeout was reached

I'm also able to replicate this bug by directly passing in the pid of the running app, found by searching the results of device.enumerate_processes() and passing process.pid.