From 805738608dd34d44cf3e0989cd13369d9efb1a6c Mon Sep 17 00:00:00 2001
From: ibaryshnikov <baryshnikov.il@gmail.com>
Date: Sun, 19 May 2019 14:42:53 +0300
Subject: [PATCH 1/2] expose forget to wasm

---
 crates/cli-support/src/js/mod.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crates/cli-support/src/js/mod.rs b/crates/cli-support/src/js/mod.rs
index 3bc66cbf..18213433 100644
--- a/crates/cli-support/src/js/mod.rs
+++ b/crates/cli-support/src/js/mod.rs
@@ -249,7 +249,7 @@ impl<'a> Context<'a> {
                     format!("{}{}\n", export, contents)
                 } else {
                     assert_eq!(export_name, definition_name);
-                    format!("{}const {} = {};\n", export, export_name, contents)
+                    format!("{}const {name} = {};\n__exports.{name} = {name};", export, contents, name = export_name)
                 }
             }
         };

From a68cdc594d9173ee495edc85b2930dec41a617b4 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Mon, 20 May 2019 09:32:37 -0700
Subject: [PATCH 2/2] Add a test that `Callback::forget` works

---
 tests/headless/main.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tests/headless/main.rs b/tests/headless/main.rs
index 88bffc75..c2b2ed2d 100755
--- a/tests/headless/main.rs
+++ b/tests/headless/main.rs
@@ -51,3 +51,11 @@ pub mod snippets;
 pub mod modules;
 pub mod anyref_heap_live_count;
 pub mod strings;
+
+#[wasm_bindgen_test]
+fn closures_work() {
+    let x = Closure::wrap(Box::new(|| {}) as Box<FnMut()>);
+    drop(x);
+    let x = Closure::wrap(Box::new(|| {}) as Box<FnMut()>);
+    x.forget();
+}