13:26:20 ERROR: Publisher hudson.plugins.cobertura.CoberturaPublisher aborted due to exception
13:26:20 java.lang.NullPointerException

and from Jenkins.log:

Nov 02, 2015 1:26:20 PM hudson.model.AbstractBuild$AbstractBuildExecution reportError
WARNING: Publisher hudson.plugins.cobertura.CoberturaPublisher aborted due to exception
java.lang.NullPointerException

Nov 02, 2015 1:26:55 PM hudson.model.Run execute

I would have expected a full stack trace at minimum. Is this something where there is a catch that throws away the info and then rethrows the null?

It would be even better if each level noted what it was trying to do in the catch ....