Xenial > Bionic: Unable to load memcached

Build:
https://travis-ci.com/github/cakephp/cakephp/jobs/362450466

I see a similar issue from early last year, but I don’t know which environments that covered.

Switching from Xenial to Bionic, I get the unable to load memcached error. I didn’t see any notes about changes in Bionic or the php language setup, but I tried installing the memcached extension manually through pecl:

pecl install memcached

However, this hangs on a user prompt about the libmemcached directory:

libmemcached directory [no] :

Is the memcached module support be automatically setup and loadable for bionic?

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