1 files changed, 18 insertions, 0 deletions
diff --git a/test/parallel/test-next-tick-fixed-queue-regression.js b/test/parallel/test-next-tick-fixed-queue-regression.js
new file mode 100644
index 0000000000..1fe82d02b1
--- /dev/null
+++ b/test/parallel/test-next-tick-fixed-queue-regression.js
@@ -0,0 +1,18 @@
+'use strict';
+
+const common = require('../common');
+
+// This tests a highly specific regression tied to the FixedQueue size, which
+// was introduced in Node.js 9.7.0: https://github.com/nodejs/node/pull/18617
+// More specifically, a nextTick list could potentially end up not fully
+// clearing in one run through if exactly 2048 ticks were added after
+// microtasks were executed within the nextTick loop.
+
+process.nextTick(() => {
+  Promise.resolve(1).then(() => {
+    for (let i = 0; i < 2047; i++)
+      process.nextTick(common.mustCall());
+    const immediate = setImmediate(common.mustNotCall());
+    process.nextTick(common.mustCall(() => clearImmediate(immediate)));
+  });
+});