Cannot invoke "String.length()" because "signature" is null on ConstantDynamic ldc

[jumanji144]

I was making some test classes, and i encountered this error whilest using ConstantDynamic

VF Code Output: https://pastebin.com/n6vqPt2w

Original class file (compressed so i can upload it to github) Test.tar.gz

(and yes, this code is runnable)