Resolving this issue as fixed, since I have merged in the slightly modified version of the patch written by Mike Fikes.

OK, I decided to simply try out the attached patch and make sure nothing breaks, and none of the existing tests do, after some tweaks to the patch for a changed line of context, fixing an unrelated issue. That patch is attached as CRRBV-16-try2.patch, maintaining Mike’s authorship since I didn’t change anything substantive.

I will commit this to core.rrb-vector master soon, and hopefully there will be a new release soon-ish.

Mike, let me know if there is any reason you have changed your mind about these changes, or if you know of others that might be useful.

Someone gave me the hint to try lumo or planck, so today (2019-Sep-24) I attempted the following commands on a Mac with Homebrew and JDK 8 installed.

Does getting this working mean that the code supports running in a self-hosted ClojureScript environment? Or does the presence of WARNING messages indicate problems that would prevent others from using core.rrb-vector in such an environment?

$ brew install planck

$ git clone

$ cd core.rrb-vector

$ git checkout 4f2980eea86903db4c680c4d6cbe0d6564720d43

$ plk -A:cljs:cljs-test

cljs.user=> (require '[clojure.core.rrb-vector.test-common])

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/peephole-optimization-count at line 15 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/fallback-to-slow-splice-count1 at line 16 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/fallback-to-slow-splice-count2 at line 17 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/peephole-optimization-count at line 20 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/fallback-to-slow-splice-count1 at line 21 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Use of undeclared Var clojure.core.rrb-vector.rrbt/fallback-to-slow-splice-count2 at line 22 /Users/andy/clj/core.rrb-vector/src/test/cljs/clojure/core/rrb_vector/test_utils.cljs

WARNING: Wrong number of args (1) passed to clojure.core.rrb-vector.trees/tail-offset at line 43 /Users/andy/clj/core.rrb-vector/src/main/cljs/clojure/core/rrb_vector/debug_platform_dependent.cljs

nil

cljs.user=> (require '[clojure.test :as test])

nil

cljs.user=> (test/run-tests 'clojure.core.rrb-vector.test-common)

Testing clojure.core.rrb-vector.test-common

clojurescript-version 1.10.520

Mike, I have made many other fixes to core.rrb-vector recently, but have not examined this issue in any detail yet.

If there is some way I can learn to create an automated test, or even learn what steps to try manually to see whether the code supports bootstrapped ClojureScript, or not, I’d be interested to find out.

A recent development that could help in supporting bootstrapped ClojureScript is a tool that facilitates running unit tests in the Lumo and Planck self-hosted environments: https://github.com/mfikes/tach