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ArrayIndexOutOfBoundsException when calling super of Java class #2923

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yamam opened this issue May 9, 2015 · 3 comments
Closed

ArrayIndexOutOfBoundsException when calling super of Java class #2923

yamam opened this issue May 9, 2015 · 3 comments
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@kares
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java integration JRuby 1.7.x JRuby 9000
Milestone
JRuby 1.7.22

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@yamam
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yamam commented May 9, 2015

I made subclass of VBox(javafx class). In constructor, I call super, and ArrayIndexOutOfBoundsException occurs rarely.

java_import 'javafx.scene.layout.VBox'

class MyVBox < VBox
    def initialize(a)
        super
    end
end

p VBox.new.getClass.getDeclaredConstructors
MyVBox.new(3)

Run above script many times.

for i in {1..100} 
do
  echo $i
  jruby-9.0.0.0.pre2/bin/jruby test.rb
done
1
java.lang.reflect.Constructor[public javafx.scene.layout.VBox(double), public javafx.scene.layout.VBox(javafx.scene.Node[]), public javafx.scene.layout.VBox(double,javafx.scene.Node[]), public javafx.scene.layout.VBox()]@87761d
2
java.lang.reflect.Constructor[public javafx.scene.layout.VBox(double), public javafx.scene.layout.VBox(javafx.scene.Node[]), public javafx.scene.layout.VBox(double,javafx.scene.Node[]), public javafx.scene.layout.VBox()]@87761d
3
java.lang.reflect.Constructor[public javafx.scene.layout.VBox(double), public javafx.scene.layout.VBox(javafx.scene.Node[]), public javafx.scene.layout.VBox(double,javafx.scene.Node[]), public javafx.scene.layout.VBox()]@87761d
4
java.lang.reflect.Constructor[public javafx.scene.layout.VBox(), public javafx.scene.layout.VBox(double), public javafx.scene.layout.VBox(javafx.scene.Node[]), public javafx.scene.layout.VBox(double,javafx.scene.Node[])]@87761d
CallableSelector.java:171:in `findMatchingCallableForArgs': java.lang.ArrayIndexOutOfBoundsException: 1
        from CallableSelector.java:104:in `matchingCallableArityN'
        from Java.java:781:in `call'
        from JavaMethod.java:692:in `call'
        from CachingCallSite.java:273:in `cacheAndCall'
        from CachingCallSite.java:79:in `callBlock'
        from CachingCallSite.java:83:in `call'
        from ConcreteJavaProxy.java:48:in `call'
        from IRRuntimeHelpers.java:891:in `instanceSuper'
        from IRRuntimeHelpers.java:884:in `instanceSuperSplatArgs'
        from test.rb:-1:in `invokeSuper3:initialize'
        from test.rb:5:in `RUBY$method$initialize$1'
        from CompiledIRMethod.java:134:in `call'
        from CachingCallSite.java:323:in `cacheAndCall'
        from CachingCallSite.java:173:in `callBlock'
        from CachingCallSite.java:177:in `call'
        from RubyClass.java:849:in `newInstance'
        from RubyClass$INVOKER$i$newInstance.gen:-1:in `call'
        from JavaMethod.java:312:in `call'
        from ConcreteJavaProxy.java:155:in `call'
        from CachingCallSite.java:313:in `cacheAndCall'
        from CachingCallSite.java:163:in `call'
        from test.rb:-1:in `invokeOther10:new'
        from test.rb:10:in `RUBY$script'
        from null:-1:in `invokeWithArguments'
        from Compiler.java:111:in `load'
        from Ruby.java:830:in `runScript'
        from Ruby.java:823:in `runScript'
        from Ruby.java:753:in `runNormally'
        from Ruby.java:575:in `runFromMain'
        from Main.java:404:in `doRunFromMain'
        from Main.java:299:in `internalRun'
        from Main.java:226:in `run'
        from Main.java:198:in `main'
@yamam
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yamam commented Jun 11, 2015

I analaysed the bug with jdb.

When exceotion raise at findMatchingCallableForArgs
local variables are the following values.

candidates = "[#<[Proxy:javafx.scene.layout.VBox](double,[Ljavafx.scene.Node;)>, #Proxy:javafx.scene.layout.VBox](double)>]"
mostSpecific = "#<[Proxy:javafx.scene.layout.VBox](double,[Ljavafx.scene.Node;)>"
candidate = "#<[Proxy:javafx.scene.layout.VBox](double)>"
msTypes = instance of java.lang.Class[2] ( double, class [Ljavafx.scene.Node; )
cTypes = instance of java.lang.Class[1] ( double )

msTypes is bigger than cTypes. So, an ArrayIndexOutOfBoundsException raise　when you access to cTypes[1].

for ( int i = 0; i < msTypes.length; i++ ) {
   final Class<?> msType = msTypes[i], cType = cTypes[i];

@kares kares self-assigned this Aug 14, 2015
@kares
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kares commented Aug 14, 2015

thanks @yaman little harder to reproduce (only on Java 8) but confirmed on 1.7.21 as well as 9.0.0.0

@kares kares added this to the JRuby 1.7.22 milestone Aug 14, 2015
@kares kares closed this as completed in bb98593 Aug 16, 2015
@kares kares mentioned this issue Aug 21, 2015
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@CeesZ
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CeesZ commented Sep 13, 2015

@kares I noticed that this issue was resolved for 1.7.22, but that it is not listed as a separate milestone for 9.0.0.0
Should it be listed as a separate action, or will resolving it for 1.7.22 also resolve it for future releases of 9.0.0.0 ?

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