+
+my $invalid_glob = qr/^Can't infer the element localization type from a glob and the value/;
+my $invalid_type = qr/^Can't localize an element of something that isn't an array or a hash/;
+
+{
+ local *x;
+
+ eval { localize_elem '$x', 0, 1 };
+ like $@, $invalid_type, 'invalid localize_elem "$x", 0, 1';
+}
+
+{
+ local *x;
+
+ eval { localize_elem '&x', 0, sub { } };
+ like $@, $invalid_type, 'invalid localize_elem "&x", 0, sub { }';
+}
+
+{
+ local *x;
+
+ eval { localize_elem '*x', 0, \1 };
+ like $@, $invalid_type, 'invalid localize_elem "*x", 0, \1';
+}
+
+{
+ local *x;
+
+ eval { localize_elem *x, 0, \1 };
+ like $@, $invalid_glob, 'invalid localize_elem *x, 0, \1';
+}
+
+{
+ local *x;
+
+ eval { localize_elem *x, 0, [ 1 ] };
+ like $@, $invalid_glob, 'invalid localize_elem *x, 0, [ 1 ]';
+}
+
+{
+ local *x;
+
+ eval { localize_elem *x, 0, { a => 1 } };
+ like $@, $invalid_glob, 'invalid localize_elem *x, 0, { a => 1 }';
+}
+
+{
+ local *x;
+
+ eval { localize_elem *x, 0, sub { } };
+ like $@, $invalid_glob, 'invalid localize_elem *x, 0, sub { }';
+}
+
+{
+ local *x;
+
+ eval { localize_elem *x, 0, *x };
+ like $@, $invalid_glob, 'invalid localize_elem *x, 0, *x';
+}