[racket-users] tooltip "im" message

I have a file on which I’m getting this DrRacket internal error: interval-map-cons*!: start is not strictly less than end im: (make-interval-map '(((390 . 410) #(struct:tooltip-info #(str... start: 3201 end: 3201 obj: (tooltip-info (object:...ivate/get-extend.rkt:134:12 ...) 320...

[racket-users] existing predicate for membership in TR Sexp type?

Now that I know how much faster ‘assert’ can be than ‘cast’, I’m eager to replace uses of ‘assert' all over the place. Specifically, in my PL class, I’m hoping to get rid of uses of (cast … Sexp) that wind up principally in RHSes of match clauses. In order to do this, I need a predicate of

RE: [racket-users] repeated code in interactions of scribble

Thanks very much. A nice and clear answer. May be I can insert tagged elements and elemrefs in code:comment escaping with #, in order to provide links to definitions in previous examples. I'll try that later. Thanks again, Jos _ From: Ben Greenman [mailto:benjaminlgreen...@gmail.com]

[racket-users] interesting reproducible DrR core dump

I haven’t finished (or really even started) minimizing this yet, but I’m getting a reproducible core dump in DrRacket when running one of my grading scripts. It seems to be related to the top level; specifically, to trigger the crash, I have to run in DrRacket and then call a particular