From 9fe3f1f6df1c9ad1173725cb75ec257f4e4a6849 Mon Sep 17 00:00:00 2001
From: Richard Gibson <richard.gibson@gmail.com>
Date: Tue, 18 Feb 2025 19:02:15 -0500
Subject: [PATCH] Normative: Align ArrayBuffer sliceToImmutable length clamping
 with slice

Ref https://github.com/tc39/proposal-immutable-arraybuffer/issues/1#issuecomment-2666956203
---
 spec.emu | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/spec.emu b/spec.emu
index 17c13a8..dc71b7f 100644
--- a/spec.emu
+++ b/spec.emu
@@ -683,9 +683,7 @@ contributors: Mark S. Miller, Richard Gibson
             1. Let _bounds_ be ? ResolveBounds(_len_, _start_, _end_).
             1. Let _first_ be _bounds_.[[From]].
             1. Let _final_ be _bounds_.[[To]].
-            1. Let _newLen_ be _final_ - _first_.
-            1. NOTE: This differs from <emu-xref href="#sec-arraybuffer.prototype.slice" title></emu-xref>, which instead clamps _newLen_ to be non-negative.
-            1. If _newLen_ &lt; 0, throw a *RangeError* exception.
+            1. Let _newLen_ be max(_final_ - _first_, 0).
             1. NOTE: Side-effects of the above steps may have detached or resized _O_.
             1. If IsDetachedBuffer(_O_) is *true*, throw a *TypeError* exception.
             1. Let _fromBuf_ be _O_.[[ArrayBufferData]].