Add TODO.md

Author: borkdude

TODO.md

@@ -0,0 +1,23 @@
+# TODO
+
+## Method resolution doesn't walk class hierarchy for interface methods
+
+`.meta` on a value type-hinted as `^clojure.lang.APersistentMap` fails with `NoSuchFieldException: meta`, even though APersistentMap implements `IMeta`. Workaround: hint with the interface directly, e.g. `(.meta ^clojure.lang.IMeta this)`.
+
+Repro in bb:
+
+```clojure
+(let [m (proxy [clojure.lang.APersistentMap clojure.lang.IMeta clojure.lang.IObj] []
+          (iterator [] (.iterator {}))
+          (containsKey [k] false)
+          (entryAt [k] nil)
+          (valAt ([k] nil) ([k d] d))
+          (count [] 0)
+          (assoc [k v] nil)
+          (without [k] nil)
+          (seq [] nil)
+          (meta [] {:works true})
+          (withMeta [md] nil)
+          (toString [] (str (.meta this))))]
+  (.toString m))
+```