Re: [boost] [iostreams] 1.41 gzip filter regression

Subject: Re: [boost] [iostreams] 1.41 gzip filter regression
From: Michael Dickey (mike_at_[hidden])
Date: 2009-12-03 19:22:57

   For what it's worth, I seem to have encountered the same bug with Boost
   1.41.  Strangely enough, our gzip unit tests work fine on OSX with 1.41, but
   fail on CentOS 5 with "gzip errors."  Same tests work fine on all platforms
   with 1.37 through 1.40.  I mention this in case it might have something to
   do with the version of zlib that ships with CentOS 5?  Alexander, which
   platform are you using?
   Take care,
   -Mike
   On 12/2/09 1:59 AM, Alexander Arhipenko wrote:

Hi guys,

In 1.41 we are experiencing regression in boost::iostreams::gzip_decompressor.
Almost 50% percents of our test *.gz files failed to decompress.

Following code snippet usually throws gzip error:

   std::ifstream f(n, std::ios_base::in | std::ios_base::binary);

   if(!f)
   {
      std::cerr<<"cant' open "<<n<<'\n';
   }

   namespace io = boost::iostreams;

   io::filtering_istream in;
   in.push(io::gzip_decompressor() );
   in.push(f);

   std::istreambuf_iterator<char> b(in);
   std::istreambuf_iterator<char> e;

   std::cout<<n<<'\n';

   std::copy(b, e, std::ostream_iterator<char>(std::cout) );

Maybe that is caused by incorrect api usage.
In this case, sorry for the noise in advance.

I've attached minimal example that reproduces the issue.
Build showfile executable and run ./showfile myfile.odt.bz2.gz > result.
You should have 'error: gzip error' on stderr.

Regards
  

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