[Mono-dev] mono 2.6+ : Garbage added to BinaryWriter/GZipStream output?

[Miguel de Icaza]

Hello Hin-Tak,

    There was a bug in Mono 2.6 that got fixed in a service release (2.6.1).

    Could you confirm which Mono version you are running?   Use: mono --version on the command line.

On Jan 26, 2010, at 8:31 PM, Hin-Tak Leung wrote:

> (I am not on the list - please CC)
> 
> I have a small application which writes gzip'ed data like this:
> 
> sw = new BinaryWriter(new GZipStream(new FileStream(filename,
>      FileMode.Create, FileAccess.Write, FileShare.None),
>      CompressionMode.Compress, true
>      );
> sw.Write(...);
> sw.Write(...);
> sw.Flush();
> sw.Close();
> 
> It use to work fine with mono 2.4, and still does in a way with mono 2.6 . 
> What happens is that now it seems to append a lot of extra garbage to the end of the output.
> 
> The uncompressed data is 1234127 bytes, and still recoverable in a indentical manner from the output with gzip -dc; but the output file is now 8126815 bytes with mono 2.6.x instead of 282363 bytes under mono 2.4.x , so almost 8MB of garbage is added somehow. I tried truncating the file, but it seems to truncate the gz stream as well.
> 
> So does anybody else observe similiar problems and/or know of any reasons why mono 2.6 behaves differently in this regard compared to mono 2.4?
> 
> 
> 
> 
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