tree 3585d1dacfdf4b8693e722a122c534fbde851e86
parent 773ec38f906ff034cdd10d11c2720119f7ce9326
author Neil Fuller <nfuller@google.com> 1464370343 +0100
committer Neil Fuller <nfuller@google.com> 1464776224 +0100

Improve getChars() bounds checking and add a test

The dstEnd calculation could previously overflow and a negative
dstBegin wasn't being caught in one specific case.

Bug: 28998511
(cherry picked from commit 6bf866608fbbd6aad37ba0daa288778a6f1fad41)

Change-Id: I9e16f2d2eda4272e6e704d27a10c7acf192349c7