sumFrom(), maxFrom() raising VerifyError on Android

Given that the following snippet works: 

  List<Integer> testCollection = new ArrayList<Integer>(Arrays.asList(new Integer[] { 1, 2, 3, 4 , 5, 6 }));
  int result1 = max(testCollection, on(Integer.class).intValue());
  int result2 = sum(testCollection, on(Integer.class).intValue());

I would expect those to also work, the same way:

  List<Integer> testCollection = new ArrayList<Integer>(Arrays.asList(new Integer[] { 1, 2, 3, 4 , 5, 6 }));
  int result1 = maxFrom(testCollection).intValue();
  int result2 = sumFrom(testCollection).intValue();

But the later raise VerifyError on Android, more precisely when tryng to access 
some net.sf.cglib.proxy.Enhancer class.

 Ljava/lang/reflect/InvocationTargetException;:
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by:
 Ljava/lang/VerifyError;: net.sf.cglib.proxy.Enhancer
    at ch.lambdaj.proxy.ProxyUtil.createEnhancer(ProxyUtil.java:89)
    at ch.lambdaj.proxy.ProxyUtil.createProxy(ProxyUtil.java:49)
    at ch.lambdaj.proxy.ProxyUtil.createIterableProxy(ProxyUtil.java:76)
    at ch.lambdaj.function.aggregate.ProxyAggregator.createProxyAggregator(ProxyAggregator.java:49)
    at ch.lambdaj.Lambda.aggregateFrom(Lambda.java:573)
    at ch.lambdaj.Lambda.aggregateFrom(Lambda.java:556)
    at ch.lambdaj.Lambda.maxFrom(Lambda.java:856)
    at com.bt.kraken.app.ui.AuthActivity.onCreate(AuthActivity.java:78)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3683)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)

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Aditional Information

 - Verified in ambdaj-2.4-with-dependencies.jar
 - Especific for Android Platform
 - Android DX Tool issues the following warnings for several cglib classes

[2012-05-10 03:00:49 - Kraken Application] Dx warning: Ignoring InnerClasses 
attribute for an anonymous inner class
(net.sf.cglib.util.StringSwitcher$Generator$1) that doesn't come with an
associated EnclosingMethod attribute. This class was probably produced by a
compiler that did not target the modern .class file format. The recommended
solution is to recompile the class from source, using an up-to-date compiler
and without specifying any "-target" type options. The consequence of ignoring
this warning is that reflective operations on this class will incorrectly
indicate that it is *not* an inner class.

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------------
Submitter Insight

Meanwhile, the library is still fully functional and (I guess) its a better 
option to go for the little more verbose version of the sum/max calls for they 
might be faster. It would be great to have a smaller version of this library 
aim at Android specifically. This should save some precious kbytes from the 
final APK and, if there`s no workaround for this issue, save a lot of time from 
developers all around.

Back on the issue at hand, this might be caused by a dependency error on some 
API not included on Android standard J5SE API mirror. I will try and download 
the lambdaj source and drop it on a standard Android project on Eclipse to see 
how it fares. Any leads on a possible issue will be apreciated. 

Thanks in advance for your great work. I`ll keep you posted on any progress at 
my side...
Original issue reported on code.google.com by bruno.vinicius.ds@gmail.com on 10 May 2012 at 6:33
adarro / lambdaj

sumFrom(), maxFrom() raising VerifyError on Android #94
