$ perl -e'use Foo; use Bar;'
String found where operator expected at Foo.pm line 3, near "coerce 'ArrayRef'"
        (Do you need to predeclare coerce?)
String found where operator expected at Foo.pm line 3, near "from 'Int'"
        (Do you need to predeclare from?)
syntax error at Foo.pm line 3, near "coerce 'ArrayRef'"
Compilation failed in require at -e line 1.
BEGIN failed--compilation aborted at -e line 1.