Hi,

i just notice this on my system where at least 2 or more Racket system are or have been installed:

mattei@acer:~$ racket
Welcome to Racket v8.18.0.13-2025-08-26-0bb5c26e85 [cs].
(exit)

mattei@acer:~$ /usr/racket/bin/racket
Welcome to Racket v9.1 [cs].
invalid memory reference. Some debugging context lost [,bt for context]
,bt
invalid memory reference. Some debugging context lost
context...:
body of "/usr/racket/share/pkgs/readline-lib/readline/pread.rkt"
body of "/usr/racket/share/pkgs/readline-lib/readline/rep.rkt"
body of top-level
/usr/racket/share/pkgs/xrepl-lib/xrepl/xrepl.rkt:1573:0
body of "/usr/racket/collects/racket/interactive.rkt"

i have this message:
invalid memory reference. Some debugging context lost [,bt for context]

not sure if it is a bug or just on my system.