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`my()` in false conditional prohibited
Fatalize `$*` and `$#`
Fatalize unqualified use of `dump()`
Remove `File::Glob::glob()`
`pack()` no longer can return malformed UTF-8
Any set of digits in the Common script are legal in a script run of another script
`JSON::PP` enable `allow_nonref` by default
Site paths moved from `/usr/local/…/perl5` to `/usr/local/…/perl5/5.30`
The following features are deprecated:
In XS code, use of various macros dealing with UTF-8.
You can find additional information in the upstream link:https://perldoc.perl.org/5.30.0/perl5300delta.html[perldelta] document.