Return an error type instead of unwrapping in the vec serializer
Return an error type instead of unwrapping in the vec serializer

erickt/serde,infinityb/serde,jmesmon/serde,csmulhern/serde,3Hren/serde,serde-rs/serde,oli-obk/rust-serde,Ticki/serde,Byron/serde,Hoverbear/serde,skade/serde,thorbenk/serde,JohnHeitmann/serde,tempbottle/serde,pcwalton/serde,sidred10/serde,eefriedman/serde