Don't read before the start of heap buffers.

Don't read before the start of buffer containing the name being parsed.

R=scottmg@chromium.org
BUG=693629
Review-Url: https://codereview.chromium.org/2657773002
Cr-Commit-Position: refs/heads/master@{#446041}
Committed: https://chromium.googlesource.com/chromium/src/+/b4054e8b83b60019c8cdcc9e9025fc6138725cf4

[dominicc (has gone to gerrit), 2017-01-25 04:46:04]

The CQ bit was checked by dominicc@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-25 04:46:24]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dominicc (has gone to gerrit), 2017-01-25 04:50:06]

PTAL

[commit-bot: I haz the power, 2017-01-25 07:43:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-25 07:43:25]

Dry run: This issue passed the CQ dry run.

[scottmg, 2017-01-25 17:00:20]

arr[-1] always a Pretty Good Idea.

lgtm

[scottmg, 2017-01-25 17:00:58]

lgtm

[scottmg, 2017-01-25 17:01:11]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2017-01-25 17:01:53]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-25 17:06:25]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1485363671524960, "parent_rev":
"d7d3ad002ee9f002bf7f7f763a6a815052602ac1", "commit_rev":
"b4054e8b83b60019c8cdcc9e9025fc6138725cf4"}

[commit-bot: I haz the power, 2017-01-25 17:07:00]

Description was changed from

==========
Don't read before the start of buffer containing the name being parsed.

R=scottmg@chromium.org
BUG=693629
==========

to

==========
Don't read before the start of buffer containing the name being parsed.

R=scottmg@chromium.org
BUG=693629

Review-Url: https://codereview.chromium.org/2657773002
Cr-Commit-Position: refs/heads/master@{#446041}
Committed:
https://chromium.googlesource.com/chromium/src/+/b4054e8b83b60019c8cdcc9e9025...
==========

[commit-bot: I haz the power, 2017-01-25 17:07:01]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b4054e8b83b60019c8cdcc9e9025...

[dominicc (has gone to gerrit), 2017-04-04 08:04:43]

On 2017/01/25 at 17:07:01, commit-bot wrote:
> Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b4054e8b83b60019c8cdcc9e9025...

Note to self, this is issue 683629, not 693629.