Merge "Less confusing error message."

                throw new IOException("Root has not present");

            }

            return ApkChecksums.verityHashForFile(new File(filename), hashInfo.rawRootHash);

        } catch (IOException ignore) {

            Slog.e(TAG, "ERROR: could not load root hash from incremental install");

        } catch (IOException e) {

            Slog.i(TAG, "Could not obtain verity root hash", e);

        }

        return null;

    }