Empty seq match can throw Exception

Question

For example:

user=> (let [x 5] (m/match x ([] :seq) true :else false))
IllegalArgumentException Don't know how to create ISeq from: java.lang.Long  clojure.lang.RT.seqFrom (RT.java:542)


The problem appears to be that empty seq patterns are converted to LiteralPatterns for (). IPatternCompile for LiteralPatterns checks if the literal is () -- if so it emits an {{empty?}} test without any check to see if the ocr is {{Seqable}}.

Answer 1

Reference: https://clojure.atlassian.net/browse/MATCH-120 (reported by glchapman)