With ASYNC-171, {{bounded-count}} was excluded. But, it is actually being used in {{cljs.core.async/to-chan}} here:
https://github.com/clojure/core.async/blob/43139e44b04dd09bb5faa555ea8ebd2ca09e25ce/src/main/clojure/cljs/core/async.cljs#L395
It has evidently been in use (inadvertently incorrectly) since 2013 (well prior to it having been added as a core function), with it picking up a previous private definition that had existed in {{cljs.core}} all along (but with the arguments reversed, evidently fortuitously without breaking things completely).
Here is a REPL transcript illustrating the regression that ASYNC-171 causes:
`
ClojureScript Node.js REPL server listening on 52771
To quit, type: :cljs/quit
cljs.user=> (require 'cljs.core.async)
WARNING: Use of undeclared Var cljs.core.async/bounded-count at line 395 file:/Users/mfikes/Projects/core.async/target/core.async-0.1.0-SNAPSHOT.jar!/cljs/core/async.cljs
WARNING: Use of undeclared Var cljs.core.async/bounded-count at line 395 .cljs_node_repl/cljs/core/async.cljs
nil
cljs.user=> (cljs.core.async/to-chan [])
TypeError: Cannot read property 'call' of undefined
at cljs$core$async$to_chan (/Users/mfikes/Projects/clojurescript/.cljs_node_repl/cljs/core/async.js:3042:70)
at repl:1:113
at repl:9:3
at repl:14:4
at Object.exports.runInThisContext (vm.js:54:17)
at Domain.<anonymous> ([stdin]:41:34)
at Domain.run (domain.js:221:14)
at Socket.<anonymous> ([stdin]:40:25)
at emitOne (events.js:77:13)
at Socket.emit (events.js:169:7)
`
You can also presumably see this if you run the ClojureScript {{core.async}} unit tests. In particular the {{cljs.core.async.pipeline-test}} namespace makes use of {{to-chan}}. (I say presumably—I haven't figured out how to run them in JVM ClojureScript, but ran the same in self-hosted ClojureScript and discovered this regression running these unit tests with the fork of {{core.async}} for self-hosted ClojureScript here: https://github.com/mfikes/andare
