From: Eric Wong <normalperson@...>
Date: 2014-08-30T23:57:03+00:00
Subject: [ruby-core:64679] Re: [ruby-trunk - Bug #10101] Zlib::GzipReader produce different outputs for different methods applied

nagachika00@gmail.com wrote:
> I don't have time to investigate this right now.
> And zlib has no maintainer according to
> https://bugs.ruby-lang.org/projects/ruby/wiki/MaintainersStdlib
> Are there anyone who can handle this?

Hi, r47327 should fix this:
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r47327 | normal | 2014-08-30 23:53:28 +0000 (Sat, 30 Aug 2014) | 18 lines

zlib: GzipReader#rewind preserves ZSTREAM_FLAG_GZFILE

* ext/zlib/zlib.c (gzfile_reset): preserve ZSTREAM_FLAG_GZFILE
  [Bug #10101]

* test/zlib/test_zlib.rb (test_rewind): test each_byte

We must preserve the ZSTREAM_FLAG_GZFILE flag to prevent
zstream_detach_buffer from:

a) returning Qnil and breaking out of the `each_byte' loop
b) yielding a large string to each_byte

Note: the test case in bug report takes a long time.  I found this
bug because I noticed the massive time descrepancy between
`each_byte' and `readbyte' loop before this patch.  With this patch,
`each_byte' and `readbyte' both take very long.
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I should be able to help out on zlib in the future (and many bugs
reproducible without graphical or proprietary dependency).