[ruby-core:36359] [Backport87 - Backport #4236][Assigned] zlib.c requires RB_GC_GUARD backport from 1.9

Issue #4236 has been updated by Shyouhei Urabe.

Status changed from Open to Assigned
Assignee set to Shyouhei Urabe

r31667.
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Backport #4236: zlib.c requires RB_GC_GUARD backport from 1.9
http://redmine.ruby-lang.org/issues/4236

Author: Aman Gupta
Status: Assigned
Priority: Normal
Assignee: Shyouhei Urabe
Category: ext
Target version: 


=begin
 This issue was fixed in 1.9 r28080 via this patch: http://redmine.ruby-lang.org/repositories/diff/ruby-19?rev=28080
 
 But the issue also exists in 1.8 branch, so the same patch should be backported. To replicate:
 
 <pre><code class="ruby">
 unless File.exists?("test.gz")
   File.open("test","w"){|f| f.write "helloworld "*1024 }
   `gzip test`
 end
 
 require 'zlib'
 
 class Zlib::GzipReader
   class << self
     alias new_orig new
     def new(*args)
      GC.stress=true
       new_orig(*args)
     ensure
      GC.stress=false
     end
   end
 end
 
 def parse_gzip(i=0)
   Zlib::GzipReader.new(File.open('test.gz','r'))
 end
 
 5.times do |i|
   parse_gzip
 end
 </code></pre>
 
 $ ruby simple.rb 
 simple.rb:13:in `initialize': not in gzip format (Zlib::GzipFile::Error)
 	from simple.rb:13:in `new_orig'
 	from simple.rb:13:in `new'
 	from simple.rb:21:in `parse_gzip'
 	from simple.rb:25
 	from simple.rb:24:in `times'
 	from simple.rb:24
=end



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