Kernel#select's read_array parameter is not respected
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Key: JRUBY-5487
URL: http://jira.codehaus.org/browse/JRUBY-5487
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.5.6
Environment: Linux desk4 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10
23:42:43 UTC 2011 x86_64 GNU/Linux
java version "1.6.0_22"
Java(TM) SE Runtime Environment (build 1.6.0_22-b04)
Java HotSpot(TM) 64-Bit Server VM (build 17.1-b03, mixed mode)
Reporter: Alex Young
Attachments: test_select.rb
When calling Kernel.select with a timeout of 0, it seems to expect the
read_array, write_array and error_array to be identical. If they aren't, it
gives the wrong result. For instance, if client_sock is known to have data
ready for reading, this code fails, as the readables array comes back as nil:
readables,_,_ = Kernel.select([client_sock], nil, nil, 0)
p readables[0].readline
It works fine on MRI 1.8.7-p302 and 1.9.2-p136. The attached test case shows
the problem in (a little) more detail.
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