From e9a8c80af5e99430d67cebcf7ac459e5fd243a1e Mon Sep 17 00:00:00 2001
From: Greg <greg@toki.waseda.jp>
Date: Wed, 11 Jan 2023 15:36:59 +0900
Subject: [PATCH] fix int32 overflow when grabbing strings from wasm

---
 trealla/string.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/trealla/string.go b/trealla/string.go
index 93a49d8..f679421 100644
--- a/trealla/string.go
+++ b/trealla/string.go
@@ -44,8 +44,8 @@ func (str *cstring) free(pl *prolog) error {
 
 func (pl *prolog) gets(addr, size int32) (string, error) {
 	data := pl.memory.Data()
-	ptr := int(addr)
-	end := int(addr + size)
+	ptr := int(uint32(addr))
+	end := int(uint32(addr + size))
 	if end >= len(data) {
 		return "", fmt.Errorf("invalid string of %d length at: %d", size, addr)
 	}