[racket-dev] string<? error

From: Stephen Chang (stchang at ccs.neu.edu)
Date: Thu Oct 7 16:35:48 EDT 2010

Has anyone seen an error like this before:

string<?: expects type <string> as 1st argument, given: #f; other
arguments were: "dcdf0433aca16ea2f5db9a003821f56a718d2da5"

I'm using an older version of racket,, but I havent seen the
error until recently. I get the error when I run certain files in
drracket. I started getting the error after making some changes to
stepper code (for example stepper/private/reconstruct.rkt) but I dont
think the error is due to any code I modified because I dont use the
string<? function anywhere and because I get the same error when I run
base racket files like racket/private/small-scheme.rkt and

Also, I ran setup-plt and the error still occurs. Anyone have any
ideas where the error is coming from?

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