@mflatt To bother you some more… my rendered interactions in my Hackett docs sometimes have stdout duplicated for reasons I don’t understand, such as in the second interaction on this page: http://docs.racket-lang.org/hackett/guide-quick-start.html

I cannot reproduce that with racket/sandbox directly, but it happens consistently (and, as far as I can tell, deterministically) with scribble/example. Do you have any idea why that might be happening?

The weird thing is that it only happens for some examples, but they always appear to be the same ones.

I seem to be hitting an exception on the package web site?

When I visit https://pkgd.racket-lang.org/pkgn/search?q=trace I get:

Exception
The application raised an exception with the message:

get-implied-docs: arity mismatch;
 the expected number of arguments does not match the given number
  expected: 1
  given: 0
Stack trace:

for-loop at:
  line 628, column 4, in file /home/pkgserver/racket-pkg-website/src/site.rkt
build-pkg-rows/num-todos at:
  line 621, column 0, in file /home/pkgserver/racket-pkg-website/src/site.rkt
package-summary-table at:
  line 597, column 0, in file /home/pkgserver/racket-pkg-website/src/site.rkt
<unknown procedure> at:
  line 127, column 35, in file /home/pkgserver/racket-pkg-website/src/site.rkt
<unknown procedure> at:
  line 340, column 33, in file /home/pkgserver/racket/collects/racket/contract/private/arrow-higher-order.rkt