From b95e34130f416388f9333fa57fde32e7156ec60d Mon Sep 17 00:00:00 2001
From: Simon Lydell <simon.lydell@gmail.com>
Date: Sat, 1 Aug 2026 10:50:20 +0200
Subject: [PATCH 1/3] Fix watch mode never executing new code with --workers=1

---
 lib/Supervisor.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/Supervisor.js b/lib/Supervisor.js
index 43fcbd38..c8155757 100644
--- a/lib/Supervisor.js
+++ b/lib/Supervisor.js
@@ -272,6 +272,8 @@ function run(elmTestVersion, pipeFilename, report, processes, dest, watch) {
     // If just one process, run single-threaded.
     if (processes === 1) {
       var { run } = require(dest);
+      // Allow the generated file to be `require`d again (for watch mode).
+      delete require.cache[dest];
       var send = run(
         0,
         /** @type { (response: any) => void } */

From 59d95a997f06eaa065daae54c2f9e391478e7c76 Mon Sep 17 00:00:00 2001
From: Simon Lydell <simon.lydell@gmail.com>
Date: Sat, 1 Aug 2026 10:50:30 +0200
Subject: [PATCH 2/3] Fix watch mode failing after first reload with
 --workers=1

Previously, we were accidentally writing `Elm` to the global object,
and Elm has checks in place for this:

> Your page is loading multiple Elm scripts with a module named Elm.Test.Generated.Main. Maybe a duplicate script is getting loaded accidentally? If not, rename one of them so I know which is which!

This commit fixes the wrapper around the Elm JS code so that we write to
a temporary, local object instead.
---
 lib/Generate.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/Generate.js b/lib/Generate.js
index c2e799f2..bb47c4cf 100644
--- a/lib/Generate.js
+++ b/lib/Generate.js
@@ -23,10 +23,10 @@ function prepareCompiledJsFile(pipeFilename, dest) {
   const content = fs.readFileSync(dest, 'utf8');
   const finalContent = `
 ${before}
-var Elm = (function(module) {
+var Elm = (function() {
 ${patch(content)}
 return this.Elm;
-})({});
+}).call({});
 var pipeFilename = ${JSON.stringify(pipeFilename)};
 ${after}
   `.trim();

From dca4feec3a3ad7b2e335d09344c2c5e1a2a04196 Mon Sep 17 00:00:00 2001
From: Simon Lydell <simon.lydell@gmail.com>
Date: Sat, 1 Aug 2026 12:38:31 +0200
Subject: [PATCH 3/3] Fix memory leak in single-threaded watch mode

---
 templates/after.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/templates/after.js b/templates/after.js
index 0689d426..05898f84 100644
--- a/templates/after.js
+++ b/templates/after.js
@@ -1,5 +1,7 @@
 function run(index, receive) {
   var app = Elm.Test.Generated.Main.init({ flags: index });
+  // Without this, each run leaks memory in single-threaded mode:
+  Elm = null;
   app.ports.elmTestPort__send.subscribe(receive);
   return app.ports.elmTestPort__receive.send;
 }