user=> (doc clojure.edn/read-string)
-------------------------
clojure.edn/read-string
([s] [opts s])
Reads one object from the string s. Returns nil when s is nil or empty.
Reads data in the edn format (subset of Clojure data):
http://edn-format.org
opts is a map as per clojure.edn/read
Note Returns nil when s is nil or empty.. But when called with opts without explicit :eof it throws EOF error
user=> (clojure.edn/read-string {} "")
Execution error at user/eval222 (REPL:1).
EOF while reading
And without options it returns nil as expected
user=> (clojure.edn/read-string "")
nil
