o.a.c.startup.Bootstrap uses o.a.jasper.util.ExceptionUtils, but this class is not placed in bootstrap.jar, causing rather nasty failures if anything goes wrong during initial bootstrapping. This should be a fairly simple matter of updating build.xml to include it, but I wasn't sure whether including Jasper classes in the bootstrap was the done thing. There's an o.a.tomcat.util.ExceptionUtils that is identical, but that too looks like the wrong thing to grab.
It shouldn't be using the Jasper version of this class, it should be using the Catalina one if any. For a similar situation previously we copied the method to the affected class so bootstrap remained as minimal as possible. I'll try and take a look since it was almost certainly my recent changes that broke this.
Fixed the wider issue of using the wrong ExceptionUtils as well as this specific issue. Will be in 7.0.3 onwards.