Some compilation results of `irregex` cannot be cached (write/read)

[svenha]

I have a growing base of 50 complex irregex strings. I precompile all of them, store them in a file, and use the result. This works very nicely, but 1 of the irregex results contains a procedure, so that precompiling cannot work here.

Which expressions lead to procedures in the irregex result?

Can this behavior be influenced by options? (The test is run on version 0.9.10 under bigloo; if it helps, I can repeat it under Chicken or Gauche or ...)

Thanks for this excellent tool for the Scheme community!