panic happens in v0.0.2
zhou-xingxing opened this issue · comments
This kind of error happens by accident, I don’t know what happened
do you mind to show the code how you use
I am quite curious to see how you might trigger this. (We run multithreaded and don't have any problems, so I am wondering how you might create code to cause this problem)
Sorry, it is our problem. We used unsafe conversions in the code. The string variable obtained in this way can be modified.
package main
import (
"fmt"
"unsafe"
)
func Bytes2String(b []byte) string {
return *(*string)(unsafe.Pointer(&b))
}
func main() {
testBytes := []byte{'a', 'b', 'c'}
//b2s
testString := Bytes2String(testBytes)
fmt.Println(testString)
//modify
testBytes[0] = 'd'
fmt.Println(testString)
}
//output
//abc
//dbc
In other words, the value of string was modified for unexpected reasons. Cause the consistency of the keys maintained by the arcItem and arcList structures in the cache to be destroyed
@zhou-xingxing thanks for your investigation.
In gcache, it assumes that the given key is immutable. If you find any other related problems, please reopen the issue.