From 47a5b227ccfef41f0e3189e9c8e976e6f9cfd7b3 Mon Sep 17 00:00:00 2001
From: jdalton <john.david.dalton@gmail.com>
Date: Sun, 25 Jan 2015 12:12:41 -0800
Subject: [PATCH] Ensure `_.ary` treats negative `n` values as `0`.

---
 lodash.src.js |  2 +-
 test/test.js  | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/lodash.src.js b/lodash.src.js
index 01cfbb482..0ba7a9123 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -6683,7 +6683,7 @@
       if (guard && isIterateeCall(func, n, guard)) {
         n = null;
       }
-      n = n == null ? func.length : (+n || 0);
+      n = (func && n == null) ? func.length : nativeMax(+n || 0, 0);
       return createWrapper(func, ARY_FLAG, null, null, null, null, n);
     }
 
diff --git a/test/test.js b/test/test.js
index f7b5f993f..2eb3a2b6c 100644
--- a/test/test.js
+++ b/test/test.js
@@ -896,6 +896,16 @@
       deepEqual(capped('a', 'b', 'c', 'd'), ['a', 'b', 'c']);
     });
 
+    test('should treat a negative `n` as `0`', 1, function() {
+      var capped = _.ary(fn, -1);
+
+      try {
+        var actual = capped('a');
+      } catch(e) {}
+
+      deepEqual(actual, []);
+    });
+
     test('should work when provided less than the capped numer of arguments', 1, function() {
       var capped = _.ary(fn, 3);
       deepEqual(capped('a'), ['a']);