https://ask.clojure.org/index.php/tag/%26form https://ask.clojure.org/index.php/14057/defn-rejects-arity-with-args-vector-form <p>Here's the smallest case, but it seems to happen no matter how many other arities are provided or whether list or vector syntax is used for the arity.</p> <pre><code>user=&gt; (clojure-version) "1.12.0-rc1" user=&gt; (defn f [&amp;form]) Unexpected error (IndexOutOfBoundsException) macroexpanding defn at (REPL:1:1). null user=&gt; *e #error { :cause nil :via [{:type clojure.lang.Compiler$CompilerException :message "Unexpected error macroexpanding defn at (1:1)." :data #:clojure.error{:phase :macroexpansion, :line 1, :column 1, :source "NO_SOURCE_PATH", :symbol defn} :at [clojure.lang.Compiler macroexpand1 "Compiler.java" 7551]} {:type java.lang.IndexOutOfBoundsException :message nil :at [clojure.lang.RT subvec "RT.java" 1634]}] :trace [[clojure.lang.RT subvec "RT.java" 1634] [clojure.core$sigs$asig__5505 invoke "core.clj" 235] [clojure.core$sigs invokeStatic "core.clj" 259] [clojure.core$defn__5514 invokeStatic "core.clj" 317] [clojure.core$defn__5514 doInvoke "core.clj" 294] [clojure.lang.RestFn applyTo "RestFn.java" 149] [clojure.lang.Var applyTo "Var.java" 707] [clojure.lang.Compiler macroexpand1 "Compiler.java" 7525] [clojure.lang.Compiler macroexpand "Compiler.java" 7598] [clojure.lang.Compiler eval "Compiler.java" 7684] [clojure.lang.Compiler eval "Compiler.java" 7655] [clojure.core$eval invokeStatic "core.clj" 3232] [clojure.core$eval invoke "core.clj" 3228] [clojure.main$repl$read_eval_print__9240$fn__9243 invoke "main.clj" 437] [clojure.main$repl$read_eval_print__9240 invoke "main.clj" 437] [clojure.main$repl$fn__9249 invoke "main.clj" 459] [clojure.main$repl invokeStatic "main.clj" 459] [clojure.main$repl_opt invokeStatic "main.clj" 523] [clojure.main$main invokeStatic "main.clj" 668] [clojure.main$main doInvoke "main.clj" 617] [clojure.lang.RestFn invoke "RestFn.java" 400] [clojure.lang.AFn applyToHelper "AFn.java" 152] [clojure.lang.RestFn applyTo "RestFn.java" 135] [clojure.lang.Var applyTo "Var.java" 707] [clojure.main main "main.java" 40]]} </code></pre> Macros https://ask.clojure.org/index.php/14057/defn-rejects-arity-with-args-vector-form Mon, 19 Aug 2024 21:05:00 +0000