Regression: to_java fails on arrays containing nil element
----------------------------------------------------------
Key: JRUBY-2957
URL: http://jira.codehaus.org/browse/JRUBY-2957
Project: JRuby
Issue Type: Bug
Components: Java Integration
Affects Versions: JRuby 1.1.4
Reporter: Dmitry Jemerov
Priority: Critical
The following simple program completes successfully on JRuby 1.1.3 and earlier
and throws an exception on JRuby 1.1.4:
{code}
include Java
values = [nil]
values.to_java(:'java.lang.Runnable')
{code}
The exception stacktrace is:
{code}
java.lang.reflect.Array:-2:in `set': java.lang.IllegalArgumentException: array
element type mismatch
from org.jruby.javasupport.JavaArray:121:in `setWithExceptionHandling'
from org.jruby.java.addons.ArrayJavaAddons:108:in `copyDataToJavaArray'
from org.jruby.javasupport.JavaClass:1511:in `javaArrayFromRubyArray'
from org.jruby.java.addons.ArrayJavaAddons:80:in `to_java'
from
org.jruby.java.addons.ArrayJavaAddons$s_method_multi$RUBYFRAMEDINVOKER$to_java:-1:in
`call'
from org.jruby.runtime.CallSite$InlineCachingCallSite:156:in
`cacheAndCall'
from org.jruby.runtime.CallSite$InlineCachingCallSite:394:in `call'
from test:4:in `__file__'
from test:-1:in `__file__'
from test:-1:in `load'
from org.jruby.Ruby:544:in `runScript'
from org.jruby.Ruby:457:in `runNormally'
from org.jruby.Ruby:330:in `runFromMain'
from org.jruby.Main:214:in `run'
from org.jruby.Main:100:in `run'
from org.jruby.Main:84:in `main'
{code}
Suggested fix (not tested): replace java_to_ruby with ruby_to_java in
JavaUtil.java:318 (and similar contexts, like line 328).
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