Instance variables don't survive Marshal.dump/load round-trip under some
circumstances.
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Key: JRUBY-4442
URL: http://jira.codehaus.org/browse/JRUBY-4442
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.4, JRuby 1.5
Environment: Windows Vista 32-bit
Reporter: Matjaz Gregoric
Attachments: fix_marshal_load_bug.diff
Marshal.load doesn't load instance variables correctly under some circumstances.
This was noticed while encountering problems with Rails' sessions (see
http://jira.codehaus.org/browse/JRUBY-3530).
I wrote a rubyspec to cover this issue (http://rubyspec.org/issues/show/189):
{code:title=load_spec.rb}
it "preserves hash ivars when hash contains a string having ivar" do
s = 'string'
s.instance_variable_set :@string_ivar, 'string ivar'
h = { :key => s }
h.instance_variable_set :@hash_ivar, 'hash ivar'
unmarshalled = Marshal.load Marshal.dump(h)
unmarshalled.instance_variable_get(:@hash_ivar).should == 'hash ivar' # ->
returns nil in jruby
unmarshalled[:key].instance_variable_get(:@string_ivar).should == 'string
ivar'
end
{code}
Attached patch fixes this issue.
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