Dir#pos= dies if negative value provided
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Key: JRUBY-5640
URL: http://jira.codehaus.org/browse/JRUBY-5640
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules
Affects Versions: JRuby 1.6
Environment: jruby 1.6.0 (ruby 1.8.7 patchlevel 330) (2011-03-15
f3b6154) (OpenJDK Client VM 1.6.0_20) [linux-i386-java]
Reporter: Daniel Berger
Priority: Minor
Attachments: test_pos_set.rb
In MRI the Dir#pos= method accepts a negative value. It's effectively a no-op
if a read has not occurred yet, or returns nil if at least one read has already
occurred, which I assume moves the pointer to the end of the stream. The
behavior is curious, and I suspect it's driven by the rules of the underlying
seekdir() function, though I haven't thoroughly scoured the source, and the man
page for seekdir() made no mention of negative values.
JRuby fails with an Java::JavaLang::ArrayIndexOutOfBoundsException.
I've attached the test suite I'm using for berger_spec.
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