RubyArray keeps references to unreachable RubyObjects after clear, reject!,
delete and delete_at
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Key: JRUBY-2711
URL: http://jira.codehaus.org/browse/JRUBY-2711
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.1.2
Environment: Mac OS X 10.5.3; J2SE 5.0
Reporter: Micah Alles
Attachments: ruby_array_element_removal_dereference.patch
RubyArrays don't explicitly dereference elements that are removed for
Array#clear and leave extra references to other elements in the backing values
array as the elements are shifted about in the reject!, delete and delete_at
implementations. This causes memory leaks in our application as we rely on
Array#clear and Array#delete(_at|_if) to remove references to objects so they
may be collected.
Attached is a patch that removes unneeded references to RubyObjects in
RubyArray's values array for clear, reject!, delete and delete_at. The patch
also includes 4 java unit tests; there is one test for each method which assert
invalidated values entries are set to null.
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