From 5c84ed6315c67327e9836263bfc00093a8144992 Mon Sep 17 00:00:00 2001
From: Heejin Ahn <aheejin@gmail.com>
Date: Wed, 2 Feb 2022 16:24:43 -0800
Subject: [PATCH 1/2] [js-api] Throw RangeError when getArg's index is out of
 bounds

Closes #184.
---
 document/js-api/index.bs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/document/js-api/index.bs b/document/js-api/index.bs
index b06b50c3..6f0bf0a2 100644
--- a/document/js-api/index.bs
+++ b/document/js-api/index.bs
@@ -1293,7 +1293,7 @@ The <dfn method for="Exception">getArg(|exceptionTag|, |index|)</dfn> method ste
     1. Throw a {{TypeError}}.
 1. Let |payload| be **this**.\[[Payload]].
 1. If |index| ≥ |payload|'s [=list/size=],
-    1. Throw a {{TypeError}}.
+    1. Throw a {{RangeError}}.
 1. Return [=ToJSValue=](|payload|[|index|]).
 
 </div>

From 38e2d7be5c7f280f3b5209d7441edb11f414242c Mon Sep 17 00:00:00 2001
From: Heejin Ahn <aheejin@gmail.com>
Date: Thu, 3 Feb 2022 13:36:37 -0800
Subject: [PATCH 2/2] Fix getArg.tentative.any.js

---
 test/js-api/exception/getArg.tentative.any.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/js-api/exception/getArg.tentative.any.js b/test/js-api/exception/getArg.tentative.any.js
index 4b72c61f..f0a568a8 100644
--- a/test/js-api/exception/getArg.tentative.any.js
+++ b/test/js-api/exception/getArg.tentative.any.js
@@ -43,7 +43,7 @@ test(() => {
   const tag = new WebAssembly.Tag({ parameters: [] });
   const exn = new WebAssembly.Exception(tag, []);
   for (const value of outOfRangeValues) {
-    assert_throws_js(TypeError, () => exn.getArg(tag, value));
+    assert_throws_js(RangeError, () => exn.getArg(tag, value));
   }
 }, "Getting out-of-range argument");