From 139c941ff1a393def74d20a36b396309ff6052d1 Mon Sep 17 00:00:00 2001
From: Dmitry Vasilev <dmitry.vasil@gmail.com>
Date: Sun, 15 Jan 2023 21:28:40 +0800
Subject: [PATCH] Promise.then non-function callback

---
 src/eval.js  | 4 ++--
 test/test.js | 9 +++++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/eval.js b/src/eval.js
index 39c83ca..bf4dce6 100644
--- a/src/eval.js
+++ b/src/eval.js
@@ -303,8 +303,8 @@ export const eval_modules = (
         }
         let children_copy = children
 
-        const make_callback = cb => cb == null
-          ? null
+        const make_callback = cb => typeof(cb) != 'function'
+          ? cb
           : value => {
               const current = children
               children = children_copy
diff --git a/test/test.js b/test/test.js
index bedb59e..14e11f5 100644
--- a/test/test.js
+++ b/test/test.js
@@ -2818,6 +2818,15 @@ const y = x()`
     )
   }),
 
+  test('async/await then non-function', async () => {
+    await assert_code_evals_to_async(
+      `
+        await Promise.resolve(1).then(2)
+      `,
+      1
+    )
+  }),
+
   test('async/await Promise.then creates subcall', async () => {
     const i = await test_initial_state_async(`
       const x = () => 1