tree add605abcb2a382739ab0e41208b0016fb1e0056
parent 4cd7d37090450d05f894ac336fb342acb0709457
author Paul Wankadia <junyer@google.com> 1589213151 -0700
committer Paul Wankadia <junyer@google.com> 1589213242 +0000

Compute first_byte using the Regexp, not the Prog.

Change-Id: Ic893767c752afee4f41d8d39805351cf91c883e7
Reviewed-on: https://code-review.googlesource.com/c/re2/+/56214
Reviewed-by: Paul Wankadia <junyer@google.com>