StringIO.read(num, buffer) populates corrupt data in buffer or crashes jRuby
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Key: JRUBY-3526
URL: http://jira.codehaus.org/browse/JRUBY-3526
Project: JRuby
Issue Type: Bug
Components: Core Classes/Modules, Ruby 1.8.7
Affects Versions: JRuby 1.2, JRuby 1.1.6
Environment: MacOSX 10.5.6 (Intel)
java version "1.5.0_16"
jRuby 1.1.6 and jRuby 1.2.0
Reporter: Michael Rykov
Priority: Critical
Fix For: JRuby 1.3, JRuby 1.x+, JRuby 2
Attachments: stringiocrash.rb
I noticed the problem when my string data was getting altered when accessed
through StringIO.read(num, buff) API
I tried to create a small test file to reproduce the problem, but I ended up
crashing jRuby instead. Here is what I get when I run the attached file:
{code}
$ jruby ./stringiocrash.rb
blahblah
java.lang.System:-2:in `arraycopy': java.lang.ArrayIndexOutOfBoundsException
from org.jruby.util.ByteList:601:in `grow'
from org.jruby.util.ByteList:320:in `unsafeReplace'
from org.jruby.util.ByteList:336:in `replace'
from org.jruby.RubyStringIO:605:in `read'
from org.jruby.RubyStringIO$i_method_0_2$RUBYINVOKER$read:-1:in `call'
from
org.jruby.internal.runtime.methods.JavaMethod$JavaMethodNoBlock:62:in `call'
from org.jruby.internal.runtime.methods.DynamicMethod:261:in `call'
from org.jruby.internal.runtime.methods.DynamicMethod:169:in `call'
from org.jruby.runtime.callsite.CachingCallSite:300:in `cacheAndCall'
from org.jruby.runtime.callsite.CachingCallSite:157:in `call'
from $_dot_.stringiocrash:7:in `__file__'
from $_dot_.stringiocrash:-1:in `__file__'
from $_dot_.stringiocrash:-1:in `load'
from org.jruby.Ruby:564:in `runScript'
from org.jruby.Ruby:467:in `runNormally'
from org.jruby.Ruby:340:in `runFromMain'
from org.jruby.Main:214:in `run'
from org.jruby.Main:100:in `run'
from org.jruby.Main:84:in `main'
$
{code}
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