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[ASYNC-91] 'and' does not short circuit within go block in clojurescript Created: 14/Sep/14  Updated: 14/Sep/14

Status: Open
Project: core.async
Component/s: None
Affects Version/s: None
Fix Version/s: None

Type: Defect Priority: Minor
Reporter: Jan Krueger Assignee: Unassigned
Resolution: Unresolved Votes: 0
Labels: None
Environment:

core.async 0.1.338.0-5c5012-alpha



 Description   

I have the following piece of ClojureScript code within a go block:

(cond
(and (vector? x) (= (first x) :some-key)) ...)

This generates the following piece of JavaScript code for the cond case:

if (40 === f) { return d = b[9], f = cljs.core.vector_QMARK_.call(null, d), d = cljs.core.first.call(null, d), d = cljs.core._EQ_.call(null, d, new cljs.core.Keyword(null, "some-key", "some-key", -978969032)), cljs.core.truth_(f && d) ? b[1] = 42 : b[1] = 43, new cljs.core.Keyword(null, "recur", "recur", -437573268); }

This looks to me like both and arguments would actually get evaluated. As a result my code crashes whenever it hits this cond case and 'x' is not seqable.






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