Hi,

Hannes Müller <h.c.f.mueller@gmx.de> skribis:

> From 72b85f8e6a369e6aef4c6bd6bb233c0cacb80b03 Mon Sep 17 00:00:00 2001
> From: =?UTF-8?q?Hannes=20M=C3=BCller?= <>
> Date: Sat, 21 Dec 2024 16:55:13 +0100
> Subject: [PATCH] Fix make-custom-port in case encoding is #f
>
> * module/ice-9/custom-ports.scm (make-custom-port): Code fails if
> (fluid-ref %default-port-encoding) returns #f. In fact this was the
> case why readline support on MSYS2 failed for guile 3.0.10, ref.
> https://github.com/msys2/MSYS2-packages/issues/5079
> But later used canonicalize-encoding is prepared to handle #f for
> encoding. So allow encoding to also handle this case.

Applied with the simplification below.

Thanks,
Ludo’.