Adding new key to a Hash during iteration should always raise an exception

commit 2ae272118ce7e0068d5087cd321a8aa551ced581
Author: Yusuke Endoh <mame@tsg.ne.jp>
Date:   Wed Feb 17 01:29:16 2010 +0900

    adding new key into hash during iteration always raises an exception

    matz agreed.  [ruby-core:23614]

jruby -S mspec ci core\hash
jruby 1.5.0.dev (ruby 1.8.7 patchlevel 174) (2010-02-16 2770c7f) (Java HotSpot(TM) Client VM 1.6.0_18) [x86-java]
...............F....................F.........F........

1)
Hash#[]= raises RuntimeErrors if attempt to add new key during iteration FAILED
Expected RuntimeError but no exception was raised
D:/work/jruby-dev/rubyspec.git/core/hash/shared/store.rb:56
D:/work/jruby-dev/rubyspec.git/core/hash/element_set_spec.rb:5
D:/work/jruby-dev/rubyspec.git/core/hash/element_set_spec.rb:56:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8

2)
Hash#merge! raises RuntimeErrors if attempt to add new key during iteration FAILED
Expected RuntimeError but no exception was raised
D:/work/jruby-dev/rubyspec.git/core/hash/merge_spec.rb:66
D:/work/jruby-dev/rubyspec.git/core/hash/merge_spec.rb:58
D:/work/jruby-dev/rubyspec.git/core/hash/merge_spec.rb:56:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8

3)
Hash#store raises RuntimeErrors if attempt to add new key during iteration FAILED
Expected RuntimeError but no exception was raised
D:/work/jruby-dev/rubyspec.git/core/hash/shared/store.rb:56
D:/work/jruby-dev/rubyspec.git/core/hash/store_spec.rb:5
D:/work/jruby-dev/rubyspec.git/core/hash/store_spec.rb:56:in `load'
D:/work/jruby-dev/mspec.git/bin/mspec-ci:8

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