VerifyException "Attempt to split long or double on the stack" in javaflow
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Key: COCOON-1790
URL: http://issues.apache.org/jira/browse/COCOON-1790
Project: Cocoon
Type: Bug
Components: Blocks: Java Flow
Versions: 2.1.9-dev (current SVN)
Reporter: Simone Gianni
When writing code like this :
long time = System.currentTimeMillis();
Date date = new Date(time);
the given exception is thrown. It's a validation exception. This happens when
a long (maybe also a double?) is used in a constructor (not in a function
call). The following code is a workaround :
Date date = new Date();
date.setTime(time);
but can be used only when the object we are instantiating have a getter as an
alternative to the constructor parameter.
I'm having this problem with a fresh (yesterday) checkout of cocoon 2.1.X
branch. Don't know yet if this apply to other versions of cocoon. I'm using
Blackdown-1.4.2-02 on a 2.6.12-gentoo-r6 linux machine.
Googling around it seems that this exception is raised when the data type in a
pop2 JVM instruction is not correct. I think this is one of the side-effects of
the javaflow BCEL manipulations, but I'm not skilled enought on BCEL and
similar stuff to even think of a possible solution.
The exception is raised loading the javaflow class, so it will prevent the
entire flow (and not only the affected method) to be used. Also, the exception
will just tell you that the class is invalid, and not point you to the place in
code where this long is used in a constructor, so you'll have to spot it by
hand.
I can produce a test case to try to narrow it down, but the given 3 lines of
code are enought to produce the error in my javaflows.
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