Errors not logged when nthreads is enabled

[maximlt]

Errors raised in callbacks dispatched with --num-threads enabled are not logged in the console.

# app.py
import panel as pn

def cb(e):
    raise ValueError('Not logged')

b = pn.widgets.Button(name='Action')
b.on_click(cb)

b.servable()

served with panel serve app.py --num-threads 2

[TheoMathurin]

Hope this will get attention, debugging without error logs is a real pain.

[jbednar]

Any debugging help would be greatly appreciated!

[TheoMathurin]

Ok, right now I don't know how to do so, but I will give it a try when I get a chance.

[philippjfr]

Seems to be getting logged just fine with 0.14.0rc2. Could someone confirm?

[hoxbro]

I'm still not seeing anything on master.