Anyone know the origin of this difference between leiningen and boot?

lein repl
(.getFileName (first (.getStackTrace (ex-info "foo" {})))))
=> "NO_SOURCE_FILE"

boot repl
(.getFileName (first (.getStackTrace (ex-info "foo" {}))))
=> nil

Actually it's different per clojure version BOOT_CLOJURE_VERSION=1.10.0

(.getFileName (first (.getStackTrace (ex-info "foo" {}))))
nil

(.getFileName (first (.getStackTrace (ex-info "foo" {}))))
"core.clj"

With leiningen and clojure 1.10 this is

(.getFileName (first (.getStackTrace (ex-info "foo" {}))))
"form-init8078393629915638095.clj"