As I understood, using both jacoco and emma leads to a problem. I don't know what tool instruments class files first -- but after that the second one is being confused by the invalid LocalVariableTable.

In Jacoco issue it is said that before starting Jacoco already has damaged LocalVariableTable:
"While re-transforming classes those broken local variable pointers are set to default value 65532. While the JVM seems to be happy with wrong pointers in a certain range, it fails with the 65532 value."
In community post it is said that jacoco instrumentation confuses emmas.

I think Mickael Istria or Denis Golovin could provide more details.

3 апреля 2012 г. 14:14 пользователь Max Rydahl Andersen <manderse@redhat.com> написал:
waitup...so we are disabling jacoco because emma can't instrument or because emmas instrumentation confuses jacoco ?

is there a profile I can use to just get the jacoco stuff and not Emma ?

/max

On Apr 3, 2012, at 11:21 AM, Mickael Istria wrote:

> To avoid a conflict with Emma detected by Denis, jacoco is now disabled and you don't have access to the jacoco.exec file any more.
> Follow https://issues.jboss.org/browse/JBIDE-10537 for more details
> --
> Mickael Istria
> Eclipse developer at JBoss, by Red Hat
> My blog - My Tweets