Okay, you are right, regarding all up-to-date packages, it is working with "libtiff5".
My system still had "libtiff (v4.4.0-4)"(Repository: Extra) which also provides "libtiff.so.5". With the updated version of "libtiff (v4.5.0)" it provides "libtiff.so.6". Then "libtiff5" (AUR) can be installed without conflict.
Pinned Comments
DonJaime commented on 2021-07-14 08:51 (UTC) (edited on 2022-11-23 11:29 (UTC) by DonJaime)
Version 7.3 segfault problem has been fixed.
Failure in check() indicates that the setup script has been changed. Please flag the package out of date if this happens.
If the application reports a new version, you can OK the update and it will make and install an updated Arch package. (You will need your sudo password.)