From 4e047dde21aa429425b247715a31e69d9d89ac61 Mon Sep 17 00:00:00 2001
From: Yuxiao Mao <yuxiao.mao@outlook.com>
Date: Mon, 9 Jun 2025 11:18:10 +0200
Subject: [PATCH] [std] hl haxe.io.BytesBuffer.__expand check overflow

---
 std/hl/_std/haxe/io/BytesBuffer.hx | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/std/hl/_std/haxe/io/BytesBuffer.hx b/std/hl/_std/haxe/io/BytesBuffer.hx
index 12893eed0b2..72bdd1a8ece 100644
--- a/std/hl/_std/haxe/io/BytesBuffer.hx
+++ b/std/hl/_std/haxe/io/BytesBuffer.hx
@@ -47,9 +47,11 @@ class BytesBuffer {
 	}
 
 	function __expand(req:Int):Void {
-		var nsize = (size * 3) >> 1;
+		var nsize = (size * 3) >>> 1;
 		if (nsize < req)
 			nsize = req;
+		if (nsize < pos)
+			throw "Can't expand " + (size >> 10) + "K";
 		var b2 = new hl.Bytes(nsize);
 		b2.blit(0, b, 0, pos);
 		b = b2;