Unescaped left brace in regex is illegal in regex when not used as a
quantifier.
- /foo{3}/ will match foofoofoo.
- /\\new{bar}/ is illegal and should be written as /\\new\{bar}/.
PR: 226817
Sponsored by: Absolight
"defined(@array)" and "defined(%hash)" are now fatal errors
These have been deprecated since v5.6.1 and have raised deprecation
warnings since v5.16.
With hat: perl@
Sponsored by: Absolight