tags 16362 + notabug wontfix close 16362 thanks I'm sorry that you came to depend on the undocumented behavior of earlier versions of Guile, but the Scheme standards are quite clear that literals are immutable and that no guarantees are made about preserving object identity as seen by eq? or eqv?. To my knowledge we never made any promises that this would work, and we can't make it work properly in the general case in our new ahead-of-time compilation model.
I'm closing this ticket. Mark