code review 64010043: compress/bzip2: support superfluous Huffman levels.

compress/bzip2: support superfluous Huffman levels.

These should never be found in a bzip2 file but it does appear that
there's a buggy encoder that is producing them. Since the official
bzip2 handles this case, this change makes the Go code do likewise.

With this change, the code produces the same output as the official
bzip2 code on the invalid example given in the bug.

Fixes issue 7279.

[agl1, 2014-02-14 17:34:19]

Hello golang-codereviews@googlegroups.com,

I'd like you to review this change to
https://code.google.com/p/go/

[r, 2014-02-14 18:33:55]

LGTM

[agl1, 2014-02-14 22:17:49]

*** Submitted as https://code.google.com/p/go/source/detail?r=e567ba9899fb ***

compress/bzip2: support superfluous Huffman levels.

These should never be found in a bzip2 file but it does appear that
there's a buggy encoder that is producing them. Since the official
bzip2 handles this case, this change makes the Go code do likewise.

With this change, the code produces the same output as the official
bzip2 code on the invalid example given in the bug.

Fixes issue 7279.

LGTM=r
R=golang-codereviews, r
CC=golang-codereviews
https://codereview.appspot.com/64010043

[gobot, 2014-02-14 22:52:45]

This CL appears to have broken the windows-amd64-race builder.