tools.reader bug demonstrated when syntax quote contains map with key :val

Steps to reproduce with latest tools.reader 0.8.11:

From the partial investigation I've done so far, it appears this happens if a map inside of a syntax quote expression has a key :val. It looks like the wrong map is being passed to map-func, or even higher up the call stack, or perhaps map-func should be using coll in place of (:val coll).