gzipped file cannot be read with zlib

Bug #1267930 reported by Barry Haddow on 2014-01-10
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
zlib (Ubuntu)
Undecided
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Bug Description

Hi

I gzip a file (dropbox link below), but when trying to read it with zlib I get:

zlib.error: Error -3 while decompressing: invalid distances set

This seems to be a zlib problem -- using the latest zlib release (1.2.8) is fine.

For reading in the file, I am using C++ to call the zlib api, but I can reproduce the problem in a simple python program:

import gzip

fd = gzip.GzipFile("extract.2.gz", "rb")
count = 1
for line in fd:
  count +=1
print count

Ubuntu 12.04
zlib1g:
  Installed: 1:1.2.3.4.dfsg-3ubuntu4
  Candidate: 1:1.2.3.4.dfsg-3ubuntu4
  Version table:
 *** 1:1.2.3.4.dfsg-3ubuntu4 0

Problem file:
https://www.dropbox.com/s/sjkdtp5bh698arb/extract.2

cheers - Barry

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