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You used the syntax of a method call, but the slot filled by the objec
+t reference or package name contains an expression that returns a def
+ined value that is neither an object reference nor a package name. So
+mething like this will reproduce the error:

$BADREF = 42;
process $BADREF 1,2,3;
$BADREF->process(1,2,3);

$ perl -e 'package Foo::Bar; sub Foo {1}; sub Foo::Bar {1}; package ma
+in; Foo::Bar->Foo'
Can't call method "Foo" without a package or object reference at -e li
+ne 1.

'Foo::Bar'->Foo