Ludovic Courtès <ludo@gnu.org> writes:

>> +* module/ice-9/suspendable-ports.scm (decode-utf8, bad-utf8-len): Flip a
>> +couple of inequalities.
>> +* test-suite/tests/ports.test ("string ports"): Add additional invalid
>> +UTF-8 test case.
>
> Good catch!  Could you please submit it to bug-guile@gnu.org first,
> perhaps with a higher-level example based on what you have in
> <https://issues.guix.gnu.org/62240> showing how to reproduce the issue?

Sure, I've created a bug against Guile now
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=62290