Method handles in custom panel code make installer crash
This constructor of a custom panel
makes the resulting installer crash with
Looks like some introspection code chokes on JDK8 classfiles
The same issue shows up with IzPack 5.1.3.
I was able workaround - keeping JDK8+ classfiles - using the AnnotationParanamer implementation instead: that one is tried before the bytecode implementation, and will succeed when all ctor parameters are named via the javax.inject.Named annotation.
I have the very same problem. Upgrading to Picocontainer 2.15, which seems to be the latest available version, did not help.