From 1029c060f7c1f83d32cc995bf32e6a0eb8ff9b94 Mon Sep 17 00:00:00 2001
From: Brandon Bloom <brandon@brandonbloom.name>
Date: Thu, 6 Dec 2012 13:10:20 -0800
Subject: [PATCH] CLJS-437: Validate arity of 'if forms

---
 src/clj/cljs/analyzer.clj | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/clj/cljs/analyzer.clj b/src/clj/cljs/analyzer.clj
index b179fbd..ec9cb4a 100644
--- a/src/clj/cljs/analyzer.clj
+++ b/src/clj/cljs/analyzer.clj
@@ -235,6 +235,7 @@
 
 (defmethod parse 'if
   [op env [_ test then else :as form] name]
+  (assert (>= (count form) 3) "Too few arguments to if")
   (let [test-expr (disallowing-recur (analyze (assoc env :context :expr) test))
         then-expr (analyze env then)
         else-expr (analyze env else)]
-- 
1.8.0