Hi Charlie, not sure if it helps, but incidentally I currently have a change under review  which chains the initial cause into NoClassDefFoundErrors.
If it helps you to track down the problem please feel free to mention that on the review thread :) Regards, Volker Charles Oliver Nutter <head...@headius.com> schrieb am Sa. 30. Juni 2018 um 03:03: > To help illustrate a bit, here's a snippit of the code to create the > allocator. It succeeds, but the allocator later throws NoClassDefFoundError. > > https://gist.github.com/headius/cce750221cf73df76cb7f7ce92c1a759 > > - Charlie > > On Fri, Jun 29, 2018 at 8:00 PM, Charles Oliver Nutter < > head...@headius.com> wrote: > >> Hello folks! >> >> I'm improving JRuby's support for instance variables-as-fields, which >> involves generating a new JVM class with a field per instance variable in >> the Ruby class. >> >> The construction process for these classes involves an implementation of >> my "ObjectAllocator" interface, which is stored with the Ruby class. >> >> Previously, the generated classes also included a generated child class >> that implenented ObjectAllocator appropriately. I was hoping to use >> LambdaMetafactory to avoid generating that class, but I'm running into a >> problem. >> >> Say we have a Ruby class with three instance variables. JRuby will >> generate a "RubyObject3" class that holds those variables in their own >> fields var0, var1, and var2. The process leading up to the bug goes like >> this: >> >> * Generate the RubyObject3 class, in its own classloader that's a child >> of the current one. >> * Acquire a constructor handle for that class. >> * Use that constructor with LambdaMetafactory.metafactory to produce an >> allocator-creating call site. >> * Invoke that call site to get the one allocator instance we need. >> >> Note that since the metafactory call requires a Lookup, I am providing it >> one from the parent classloader. >> >> I am able to get through this process without error. However, when I >> finally invoke the allocator, I get a NoClassDefFoundError and a stack >> trace that ends at the allocator call. >> >> So...what am I doing wrong? >> >> - Charlie >> > > _______________________________________________ > mlvm-dev mailing list > email@example.com > http://mail.openjdk.java.net/mailman/listinfo/mlvm-dev >
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