install/57722: NetBSD/macppc 10 RC1 installer fails with "screen too narrow" errors

[koachan+netbsd%protonmail.com@localhost]

>Number:         57722
>Category:       install
>Synopsis:       NetBSD/macppc 10 RC1 installer fails with "screen too narrow" errors
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 24 16:20:00 +0000 2023
>Originator:     Koakuma
>Release:        10 RC 1
>Organization:
>Environment:
NetBSD 10.0_RC1 NetBSD 10.0_RC1 (GENERIC) #0: Sun Nov 5 18:30:08 UTC 2023 mkrepro%NetBSD.org@localhost:/usr/src/sys/arch/macppc/compile/GENERIC macppc
>Description:

sysinst crashes with "screen too narrow" when installing 10 RC1 on a Mac Mini G4.

stty seems to think that it can only fit a 66x27 console window, which causes sysinst's width checks to fail.
The machine's a Mac mini G4 with a 1024x768 display - the lowres display probably contributes to this issue.
>How-To-Repeat:
Run sysinst and try to install like usual.
Every menu except for the language selection will trigger the issue.
>Fix:
This can be worked around by issuing `stty cols 80` in a shell before running sysinst. It makes the installer work again but the display will be a little bit mangled, but I was able to finish the install.