I'm trying to get JIT working, but it does not work.
I set these and made sure they are set correctly by
phpinfo().

xdebug.remote_enable = On
xdebug.remote_mode = jit

Then I added erroneous function call like:

bogusfunction();

in my php source.

When the error hppened, xdebug inserted a nice error
information on generating web page, but did not attempt
to connect debug client.