From b4e7b5f5304e4b61588fdb8faa0d60bf1dfd8e06 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Mon, 17 Jul 2023 23:05:27 -0700
Subject: [PATCH] [patch] throw on negative set sizes

per https://github.com/tc39/proposal-set-methods/pull/88
---
 aos/GetSetRecord.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/aos/GetSetRecord.js b/aos/GetSetRecord.js
index 6acb138..fcb063b 100644
--- a/aos/GetSetRecord.js
+++ b/aos/GetSetRecord.js
@@ -2,6 +2,7 @@
 
 var GetIntrinsic = require('get-intrinsic');
 
+var $RangeError = GetIntrinsic('%RangeError%');
 var $TypeError = GetIntrinsic('%TypeError%');
 
 var Get = require('es-abstract/2023/Get');
@@ -32,15 +33,19 @@ module.exports = function GetSetRecord(obj) {
 
 	var intSize = ToIntegerOrInfinity(numSize); // step 6
 
-	var has = Get(obj, 'has'); // step 7
+	if (intSize < 0) {
+		throw new $RangeError('set size must be non-negative'); // step 7
+	}
+
+	var has = Get(obj, 'has'); // step 8
 
 	if (!IsCallable(has)) {
-		throw new $TypeError('has is not a function'); // step 8
+		throw new $TypeError('has is not a function'); // step 9
 	}
 
-	var keys = Get(obj, 'keys'); // step 9
+	var keys = Get(obj, 'keys'); // step 10
 	if (!IsCallable(keys)) {
-		throw new $TypeError('keys is not a function'); // step 10
+		throw new $TypeError('keys is not a function'); // step 11
 	}
 	/* globals StopIteration: false */
 	if (isSet(obj) && typeof StopIteration === 'object') {
@@ -50,5 +55,5 @@ module.exports = function GetSetRecord(obj) {
 		};
 	}
 
-	return { '[[Set]]': obj, '[[Size]]': intSize, '[[Has]]': has, '[[Keys]]': keys }; // step 11
+	return { '[[Set]]': obj, '[[Size]]': intSize, '[[Has]]': has, '[[Keys]]': keys }; // step 12
 };