From: Hal Brodigan <postmodern.mod3@...>
Date: 2011-08-20T10:30:11+09:00
Subject: [ruby-core:39027] [Ruby 1.9 - Bug #5207] StringIO#read(length,nil) does not behave in the same way as IO#read


Issue #5207 has been updated by Hal Brodigan.


Oops, that should be:

    file = File.new('test')
    file.read(2,nil)
    # => "12"

    require 'stringio'
    stringio = StringIO.new("hello")
    stringio.read(2,nil)
    TypeError: can't convert nil into String
      from (irb):3:in `read'
      from (irb):3 from /home/hal/.rvm/rubies/ruby-1.9.3-preview1/bin/irb:16:in `<main>' 

----------------------------------------
Bug #5207: StringIO#read(length,nil) does not behave in the same way as IO#read
http://redmine.ruby-lang.org/issues/5207

Author: Hal Brodigan
Status: Open
Priority: Normal
Assignee: 
Category: lib
Target version: 1.9.3
ruby -v: ruby 1.9.2p290 (2011-07-09 revision 32553) [x86_64-linux]


I noticed an incompatibility between IO#read(length,buffer) and StringIO#read, when buffer is nil.

    file = File.read('test')
    file.read(2,nil)
    # => "12"

    string = StringIO.new("hello")
    string.read(2,nil)
    TypeError: can't convert nil into String
	from (irb):3:in `read'
	from (irb):3
	from /home/hal/.rvm/rubies/ruby-1.9.3-preview1/bin/irb:16:in `<main>'

Effects both 1.9.2-p290 and 1.9.3-preview1.


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