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sudo, since version 1.8.29 started to emit an error when running it, though it still works:

$ sudo true  
sudo: setrlimit(RLIMIT_CORE): Operation not permitted

This error is not Alpine Linux related, other distros have the issue as well: https://bugzilla.redhat.com/show_bug.cgi?id=1773148

One possible workaround suggested is to add the following to /etc/sudoers.conf:

Set disable_coredump false

Though I'm not sure what the implications of this are.