nodejs
diff --git a/‎lib/timers.js‎
Lines changed: 3 additions & 0 deletions b/‎lib/timers.js‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎test/parallel/test-timers-unref-reuse-no-exposed-list.js‎
Lines changed: 14 additions & 0 deletions b/‎test/parallel/test-timers-unref-reuse-no-exposed-list.js‎
Lines changed: 14 additions & 0 deletions
@@ -598,6 +598,9 @@ Timeout.prototype.unref = function() {
     }
 
     var handle = reuse(this);
+    if (handle) {
+      handle._list = undefined;
+    }
 
     this._handle = handle || new TimerWrap();
     this._handle.owner = this;
 
@@ -0,0 +1,14 @@
+'use strict';
+
+require('../common');
+const assert = require('assert');
+
+const timer1 = setTimeout(() => {}, 1).unref();
+assert.strictEqual(timer1._handle._list, undefined,
+                   'timer1._handle._list should be undefined');
+
+// Check that everything works even if the handle was not re-used.
+setTimeout(() => {}, 1);
+const timer2 = setTimeout(() => {}, 1).unref();
+assert.strictEqual(timer2._handle._list, undefined,
+                   'timer2._handle._list should be undefined');
Original file line number	Diff line number	Diff line change
@@ -598,6 +598,9 @@ Timeout.prototype.unref = function() {
598	598	}
599	599
600	600	var handle = reuse(this);
	601	+ if (handle) {
	602	+ handle._list = undefined;
	603	+ }
601	604
602	605	this._handle = handle \|\| new TimerWrap();
603	606	this._handle.owner = this;