fix: prevent buffer reuse in async mode for Put method

If the mode is async, we need to copy request Blob to prevent
fasthttp from reusing the buffer since we are going to
use the buffer in a separate goroutine beyond the scope
of the current request.

Author: rhnvrm

stores/goredis/redis.go

@@ -169,6 +169,12 @@ type putReq struct {
 // Put sets a value to given session but stored only on commit
 func (s *Store) Put(namespace, group, uri string, b fastcache.Item, ttl time.Duration) error {
 	if s.config.Async {
+		// If the mode is async, we need to copy b.Blob to prevent
+		// fasthttp from reusing the buffer since we are going to
+		// use the buffer in a separate goroutine beyond the scope
+		// of the current request.
+		b.Blob = append([]byte(nil), b.Blob...)
+
 		s.putBuf <- putReq{namespace, group, uri, b, ttl}
 		return nil
 	}