the mutator language changes the names of procedures

[robby]

With a program like this:

#lang planet plai/plai:1/mutator
(allocator-setup "two-space.ss" 400)
(let ([f (λ (x) x)]) f)

I get the procedure name "f2" instead of "f".

This also shows up in the heap visualizer.

[plai]

I can't figure out how to fix this. I've tried putting my own 'inferred-name stx prop in a bunch of places and they don't work.