accounts/abi/bind: fix destructive packing of *big.Int (#20412)

MariusVanDerWijden · gballet · commit 7ce7c3967cf2 · 2019-12-02T10:29:25.000+01:00
diff --git a/accounts/abi/pack.go b/accounts/abi/pack.go
@@ -73,7 +73,7 @@ func packNum(value reflect.Value) []byte {
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		return U256(big.NewInt(value.Int()))
 	case reflect.Ptr:
-		return U256(value.Interface().(*big.Int))
+		return U256(new(big.Int).Set(value.Interface().(*big.Int)))
 	default:
 		panic("abi: fatal error")
 	}

Original file line number	Diff line number	Diff line change
`@@ -73,7 +73,7 @@ func packNum(value reflect.Value) []byte {`
`73`	`73`	`case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:`
`74`	`74`	`return U256(big.NewInt(value.Int()))`
`75`	`75`	`case reflect.Ptr:`
`76`		`- return U256(value.Interface().(*big.Int))`
	`76`	`+ return U256(new(big.Int).Set(value.Interface().(*big.Int)))`
`77`	`77`	`default:`
`78`	`78`	`panic("abi: fatal error")`
`79`	`79`	`}`