I've pushed a repair for this problem. It's a bug in the current expander that could be triggered by a just-right combination of `syntax-local-lift-expression` (as used by `new`) and `expand` (as used by errortrace, which is used by DrRacket).
At Sun, 1 Oct 2017 16:05:16 +0100, Laurent wrote: > Hi, > > Does anyone know a good explanation as to why the following code works > depending on whether the apparently-useless line is commented out? > > #lang racket > > #;(new object%) ; uncommenting this raises an error > > (define-namespace-anchor nsa) > (define ns (namespace-anchor->namespace nsa)) > (eval '(new object%) ns) > > The error is: > lifted.0.0: undefined; > cannot reference an identifier before its definition > with syntax location on the eval line > > Thanks! > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to racket-users+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
