What could cause this exception to be thrown by clojure.lang.Compiler.StaticMethodExpr ?

gistfile1.java

Caused by: java.lang.IllegalArgumentException: No matching method: createAsIfByAssoc, compiling:(clojure/core.clj:3970)
  at clojure.lang.Compiler.analyzeSeq(Compiler.java:6462)
	at clojure.lang.Compiler.analyze(Compiler.java:6262)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
	at clojure.lang.Compiler.analyze(Compiler.java:6262)
	at clojure.lang.Compiler.analyze(Compiler.java:6223)
	at clojure.lang.Compiler$BodyExpr$Parser.parse(Compiler.java:5618)
	at clojure.lang.Compiler$FnMethod.parse(Compiler.java:5054)
	at clojure.lang.Compiler$FnExpr.parse(Compiler.java:3674)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6453)
	at clojure.lang.Compiler.analyze(Compiler.java:6262)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6443)
	at clojure.lang.Compiler.analyze(Compiler.java:6262)
	at clojure.lang.Compiler.access$100(Compiler.java:37)
	at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:518)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6455)
	at clojure.lang.Compiler.analyze(Compiler.java:6262)
	at clojure.lang.Compiler.analyze(Compiler.java:6223)
	at clojure.lang.Compiler.eval(Compiler.java:6515)
	at clojure.lang.Compiler.load(Compiler.java:6952)
	at clojure.lang.RT.loadResourceScript(RT.java:359)
	at clojure.lang.RT.loadResourceScript(RT.java:350)
	at clojure.lang.RT.load(RT.java:429)
	at clojure.lang.RT.load(RT.java:400)
	at clojure.lang.RT.doInit(RT.java:436)
	at clojure.lang.RT.<clinit>(RT.java:318)
	... 79 more
Caused by: java.lang.IllegalArgumentException: No matching method: createAsIfByAssoc
	at clojure.lang.Compiler$StaticMethodExpr.<init>(Compiler.java:1542)
	at clojure.lang.Compiler$HostExpr$Parser.parse(Compiler.java:938)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:6455)
	... 103 more