Attempt to free the memory allocated for elem_.
Attempt to free the memory allocated for elem_.

Change-Id: I0d2c8078b3de88ee2e448d74fe01644c9437fcd9
Reviewed-on: https://code-review.googlesource.com/18030
Reviewed-by: Paul Wankadia <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>

google/re2,google/re2,google/re2,google/re2,google/re2