patch from https://github.com/golang/go/pull/68400

go.patch

From c36f0134350358f0723fdd12d50f37bfef67f6ff Mon Sep 17 00:00:00 2001
From: Zxilly <[email protected]>
Date: Fri, 12 Jul 2024 22:45:00 +0800
Subject: [PATCH] internal/bytealg: extend memchr result correctly

---
 src/internal/bytealg/indexbyte_wasm.s | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/internal/bytealg/indexbyte_wasm.s b/src/internal/bytealg/indexbyte_wasm.s
index ef4bd93070f44..d22e90448d43f 100644
--- a/src/internal/bytealg/indexbyte_wasm.s
+++ b/src/internal/bytealg/indexbyte_wasm.s
@@ -12,7 +12,7 @@ TEXT ·IndexByte(SB), NOSPLIT, $0-40
 	I64Load b_len+8(FP)
 	I32WrapI64
 	Call memchr<>(SB)
-	I64ExtendI32S
+	I64ExtendI32U
 	Set R0
 
 	Get SP
@@ -35,7 +35,7 @@ TEXT ·IndexByteString(SB), NOSPLIT, $0-32
 	I64Load s_len+8(FP)
 	I32WrapI64
 	Call memchr<>(SB)
-	I64ExtendI32S
+	I64ExtendI32U
 	Set R0
 
 	I64Const $-1