From e9de43549843da9f4f081cce917945878967df7e Mon Sep 17 00:00:00 2001
From: Suguru Motegi <suguru.motegi@gmail.com>
Date: Tue, 6 Nov 2018 21:44:31 -0800
Subject: [PATCH] timers: fix setTimeout expiration logic

Fix the timer logic to be the same as v10.30.0.

Fixes: https://github.com/nodejs/node/issues/24203

PR-URL: https://github.com/nodejs/node/pull/24214
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
---
 lib/timers.js                                     |  2 +-
 .../test-timers-timeout-with-non-integer.js       | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 test/parallel/test-timers-timeout-with-non-integer.js

diff --git a/lib/timers.js b/lib/timers.js
index 575dcf25f6e481..1531cd1fb60726 100644
--- a/lib/timers.js
+++ b/lib/timers.js
@@ -283,7 +283,7 @@ function listOnTimeout(list, now) {
     // Check if this loop iteration is too early for the next timer.
     // This happens if there are more timers scheduled for later in the list.
     if (diff < msecs) {
-      list.expiry = timer._idleStart + msecs;
+      list.expiry = Math.max(timer._idleStart + msecs, now + 1);
       list.id = timerListId++;
       queue.percolateDown(1);
       debug('%d list wait because diff is %d', msecs, diff);
diff --git a/test/parallel/test-timers-timeout-with-non-integer.js b/test/parallel/test-timers-timeout-with-non-integer.js
new file mode 100644
index 00000000000000..96efc69e5096fd
--- /dev/null
+++ b/test/parallel/test-timers-timeout-with-non-integer.js
@@ -0,0 +1,15 @@
+'use strict';
+const common = require('../common');
+
+/**
+ * This test is for https://github.com/nodejs/node/issues/24203
+ */
+let count = 50;
+const time = 1.00000000000001;
+const exec = common.mustCall(() => {
+  if (--count === 0) {
+    return;
+  }
+  setTimeout(exec, time);
+}, count);
+exec();