[CLJ-887] Error when calling primitive functions with destructuring in the arg vector

Tue, 29 Nov 2011 15:48:19 -0600

If one defines a primitive-taking function with destructuring, calling that function will result in a ClassCastException, IFF the primitive return-type hint is present.

Clojure 1.4.0-master-SNAPSHOT
user=> (defn foo [[a b] ^long x ^long y] 0)
#'user/foo
user=> (foo [1 2] 3 4)
0
user=> (defn foo ^long [[a b] ^long x ^long y] 0)
#'user/foo
user=> (foo [1 2] 3 4)
ClassCastException user$foo cannot be cast to clojure.lang.IFn$OLLL  user/eval9 (NO_SOURCE_FILE:4)
user=> (pst)
ClassCastException user$foo cannot be cast to clojure.lang.IFn$OLLL
	user/eval9 (NO_SOURCE_FILE:4)
	clojure.lang.Compiler.eval (Compiler.java:6493)
	clojure.lang.Compiler.eval (Compiler.java:6459)
	clojure.core/eval (core.clj:2796)
	clojure.main/repl/read-eval-print--5967 (main.clj:244)
	clojure.main/repl/fn--5972 (main.clj:265)
	clojure.main/repl (main.clj:265)
	clojure.main/repl-opt (main.clj:331)
	clojure.main/main (main.clj:427)
	clojure.lang.Var.invoke (Var.java:397)
	clojure.lang.Var.applyTo (Var.java:518)
	clojure.main.main (main.java:37)
nil

Clojure JIRA

[CLJ-887] Error when calling primitive functions with destructuring in the arg vector