C:\>perl6 -e "module Foo;"

C:\>perl6 -e "module Foo-1.0;"
Unable to parse module definition at line 1, near "-1.0;"
in Main (file src\gen_setting.pm, line 1559)

C:\>perl6 -e "class Foo;"

C:\>perl6 -e "class Foo-1.0;"
Unable to parse class definition at line 1, near "-1.0;"
in Main (file src\gen_setting.pm, line 1559)

C:\>