I should have guessed that you'd get that error. It's a bug in v6.1.1 that has been fixed in the development version.
Is using a development snapshot an option in your case? http://www.cs.utah.edu/plt/snapshots/ Otherwise, a possible workaround is to add each module with that error to `sandbox-namespace-spec`: (parameterize ([sandbox-namespace-specs (append (sandbox-namespace-specs) '(scribble/manual scribble/racket racket/stxparam-exptime))]) ....) At Wed, 28 Jan 2015 10:56:38 -0700, Lucas Paul wrote: > Thanks for that, Matthew. Unfortunately, when I try that, I get a new error: > > namespace-attach-module: a different instance of the same module is > already in the destination namespace > module name: "/usr/share/racket/collects/racket/stxparam-exptime.rkt" > > On Tue, Jan 27, 2015 at 2:03 PM, Matthew Flatt <[email protected]> wrote: > > The `#:requires` option of `make-evaluator` requires the named modules > > in the sandbox's namespace, but the module instances are distinct from > > any instances in the original namespace. > > > > To attach the original namespace's instances to the sandbox's > > namespace, use the `sandbox-namespace-specs` parameter: > > > > (define safe-eval > > (parameterize ([sandbox-namespace-specs > > (append (sandbox-namespace-specs) > > '(scribble/manual scribble/racket))]) > > (make-evaluator 'racket/base > > #:requires '(scribble/manual scribble/racket)))) > > > > At Tue, 27 Jan 2015 13:22:01 -0700, Lucas Paul wrote: > >> Hi. > >> > >> I want to evaluate some scribble things (in a sandbox) and then > >> combine them with other scribble things I already have lying around. > >> But I'm running into a problem. > >> > >> If I, for example, make a nicely formatted (racket) code block in a > >> sandbox, and then put it in a (para) outside of that sandbox, the > >> world explodes. Here is a minimal example: > >> > >> #lang racket > >> > >> (require racket/sandbox > >> scribble/manual) > >> > >> (define safe-eval > >> (make-evaluator 'racket/base #:requires '(scribble/manual > scribble/racket))) > >> > >> (pretty-print (racket foo)) ; Gives one output > >> (pretty-print (safe-eval '(racket foo))) ; Gives a slightly DIFFERENT > output > >> > >> (para (racket foo)) ; Finishes happily > >> (para (safe-eval '(racket foo))) ; Error > >> > >> ; end > >> > >> This is the error I get: > >> > >> para: contract violation > >> expected: pre-content? > >> given: (cached-element (style "RktSym" (list 'tt-chars (css-addition > >> '(collects #"scribble" #"racket.css")) (tex-addition '(collects > >> #"scribble" #"racket.tex")))) "foo" (vector (style "RktSym" (list > >> 'tt-chars (css-addition '(collects #"scribble" #"racket... > >> in: an element of > >> the rest argument of > >> (->* > >> () > >> (#:style (or/c style? string? symbol? #f)) > >> #:rest > >> (listof pre-content?) > >> paragraph?) > >> contract from: > >> <pkgs>/scribble-lib/scribble/base.rkt > >> blaming: anonymous-module > >> (assuming the contract is correct) > >> at: <pkgs>/scribble-lib/scribble/base.rkt:337.2 > >> > >> What is going on? Why does the same piece of code have two different > >> results depending on where it's executing? And most importantly, is > >> there a way for me to get this to work the way I /want/? > >> > >> - Lucas Paul > >> ____________________ > >> Racket Users list: > >> http://lists.racket-lang.org/users ____________________ Racket Users list: http://lists.racket-lang.org/users
