MarsSeed [1] filed a deletion request for arduino-samd-core-rc [2]:

Abandoned release candidate package from 2020.
Since that time, upstream only published newer stable versions but not
unstable/rc ones. [a]

[a]: https://github.com/arduino/ArduinoCore-samd/releases

[1] https://aur.archlinux.org/account/MarsSeed/
[2] https://aur.archlinux.org/pkgbase/arduino-samd-core-rc/

Reply via email to