Illegal hexadecimal digit ' ' ignored

Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/ab{ <-- HERE ,1}c/

:const is experimental

Possible unintended interpolation of @�APTURE in string

Having more than one /x regexp modifier is deprecated

Use of bare << to mean <<"" is deprecated

Use of uninitialized value $^LAST_SUCCESSFUL_PATTERN in regexp compilation

Use of uninitialized value $x in regexp compilation

The signatures feature is experimental