From 4c2bd0299f6b9b02526a71415c8628b71922500a Mon Sep 17 00:00:00 2001
From: Hubert Argasinski <argasinski.hubert@gmail.com>
Date: Wed, 27 Feb 2019 21:47:37 -0600
Subject: initialize results in whilst [fixes #1626]

---
 lib/whilst.js  |  2 +-
 test/whilst.js | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/whilst.js b/lib/whilst.js
index 1013d37..361b72d 100644
--- a/lib/whilst.js
+++ b/lib/whilst.js
@@ -40,7 +40,7 @@ function whilst(test, iteratee, callback) {
     callback = onlyOnce(callback);
     var _fn = wrapAsync(iteratee);
     var _test = wrapAsync(test);
-    var results
+    var results = [];
 
     function next(err, ...rest) {
         if (err) return callback(err);
diff --git a/test/whilst.js b/test/whilst.js
index 1c222c9..1ee6f11 100644
--- a/test/whilst.js
+++ b/test/whilst.js
@@ -64,6 +64,24 @@ describe('whilst', () => {
         }, 10)
     });
 
+    it('should not error when test is false on first iteration', (done) => {
+        var counter = 0;
+
+        async.whilst(
+            (cb) => cb(null, false),
+            (cb) => {
+                counter++;
+                cb(null);
+            },
+            (err, result) => {
+                expect(err).to.eql(null);
+                expect(result).to.be.undefined;
+                expect(counter).to.equal(0);
+                done();
+            }
+        );
+    });
+
     it('doWhilst', (done) => {
         var call_order = [];
 
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