Re: [julia-users] Re: changing mutable dict key creates zombie

[nbbb]

yes, hashing by identity seems weird since then you could end up with two 
keys that are mutable containers with the same values, but hash 
differently. this seems a mess. 
the only foolproof option seems be to shock-freeze mutable keys on usage, 
copying and converting them to immutable values. that also sounds bad. 
it seems, either safe and finicky or unsafe (and potentially sorry :) )