libspecio-perl 0.47-1 (amd64 binary) in ubuntu hirsute

 Specio provides classes for representing type constraints and coercion,
 along with the syntactic sugar for declaring them.
 .
 This distribution ships with a set of builtin types representing the types
 provided by the Perl interpreter itself.
 .
 Note that this is not a proper type system for Perl. Nothing in this
 distribution will magically make the Perl interpreter start checking a value's
 type on assignment to a variable.
 .
 Module Test::Specio requires the packages libtest-fatal-perl
 libtry-tiny-perl.