accounting: always drop references to underlying src fs.Object

fs/accounting/accounting.go

@@ -393,7 +393,11 @@ func (acc *Account) Close() error {
  if acc.close == nil {
  return nil
  }
- return acc.close.Close()
+ acc.in = nil
+ acc.origIn = nil
+ err := acc.close.Close()
+ acc.close = nil
+ return err
 }
 
 // Done with accounting - must be called to free accounting goroutine

fs/operations/reopen.go

@@ -31,7 +31,7 @@ var (
 
 // NewReOpen makes a handle which will reopen itself and seek to where it was on errors
 //
-// If hashOption is set this will be applied when reading from the start
+// # If hashOption is set this will be applied when reading from the start
 //
 // If rangeOption is set then this will applied when reading from the
 // start, and updated on retries.
@@ -140,5 +140,8 @@ func (h *ReOpen) Close() error {
  }
  h.opened = false
  h.err = errorFileClosed
- return h.rc.Close()
+ h.src = nil
+ err := h.rc.Close()
+ h.rc = nil
+ return err
 }