f.result = fuzzResult{Error: err}
			f.Fail()
			fmt.Fprintf(f.w, "%v\n", err)
			if crashErr, ok := err.(fuzzCrashError); ok {
				crashPath := crashErr.CrashPath()
				fmt.Fprintf(f.w, "Failing input written to %s\n", crashPath)
				testName := filepath.Base(crashPath)
				fmt.Fprintf(f.w, "To re-run:\ngo test -run=%s/%s\n", f.name, testName)
			}
		}

	path string
	err  error
}

func (e *crashError) Error() string {
	return e.err.Error()
}

func (e *crashError) Unwrap() error {
	return e.err
}

func (e *crashError) CrashPath() string {
	return e.path
}

type corpus struct {
	entries []CorpusEntry
	hashes  map[[sha256.Size]byte]bool
}

// addCorpusEntries adds entries to the corpus, and optionally writes the entries