Foreman » Smart Proxy

On a default Debian Wheezy (7) installation, the smart proxy logs the following warning when starting up:

W, [2015-09-02T10:44:00.718272 #11543]  WARN -- : Unable to overwrite interrupt trap: undefined method `version' for nil:NilClass

Full context with debugging enabled:

W, [2015-09-02T10:44:00.133324 #11536]  WARN -- : Couldn't find settings file /etc/foreman-proxy/settings.d/foreman_proxy.yml. Using default settings.
I, [2015-09-02T10:44:00.133436 #11536]  INFO -- : 'foreman_proxy' settings were initialized with default values: :enabled: true
I, [2015-09-02T10:44:00.135749 #11536]  INFO -- : Finished initialization of module 'foreman_proxy'
I, [2015-09-02T10:44:00.136141 #11536]  INFO -- : 'facts' module is disabled.
I, [2015-09-02T10:44:00.136492 #11536]  INFO -- : 'dns_nsupdate' settings were initialized with default values: :dns_key: , :dns_server: localhost, :enabled: false
I, [2015-09-02T10:44:00.145555 #11536]  INFO -- : 'dns' settings were initialized with default values: :use_provider: dns_nsupdate
I, [2015-09-02T10:44:00.147968 #11536]  INFO -- : Finished initialization of module 'dns'
I, [2015-09-02T10:44:00.148408 #11536]  INFO -- : 'templates' module is disabled.
I, [2015-09-02T10:44:00.150972 #11536]  INFO -- : Finished initialization of module 'tftp'
I, [2015-09-02T10:44:00.151368 #11536]  INFO -- : 'dhcp' module is disabled.
I, [2015-09-02T10:44:00.420330 #11536]  INFO -- : Finished initialization of module 'puppetca'
I, [2015-09-02T10:44:00.421283 #11536]  INFO -- : 'puppet' settings were initialized with default values: :puppet_provider: puppetrun, :puppetdir: /etc/puppet, :salt_puppetrun_cmd: puppet.run, :use_cache: true
I, [2015-09-02T10:44:00.423631 #11536]  INFO -- : Finished initialization of module 'puppet'
I, [2015-09-02T10:44:00.424076 #11536]  INFO -- : 'bmc' module is disabled.
I, [2015-09-02T10:44:00.424610 #11536]  INFO -- : 'realm' module is disabled.
W, [2015-09-02T10:44:00.718272 #11543]  WARN -- : Unable to overwrite interrupt trap: undefined method `version' for nil:NilClass