Can't output message "list" from coll dumpout

I've made an object to route messages in which a coll is used to define the arguments of a route object. The coll has numerical indices: "1, foo; 2 bar;" etc. dump is sent to the coll, the symbol prefix is stripped, sprintf formats it to "1 foo", and that is sent to a router that routes each message into the appropriate inlets of another route object.

However when the message in the coll is "list" it will not print anything. I understand this is probably a restricted message, but it doesn't make much sense that "list" would be, instead of an actual list. Are there any workarounds to this?