is_deeply($glob2re->('a}'), undef, 'open right brace');
is_deeply($glob2re->('*.[ch]'), '[^/]*?\\.[ch]', 'suffix glob');
is_deeply($glob2re->('{[a-z],9,}'), '([a-z]|9|)' , 'brace with range');
is_deeply($glob2re->('a}'), undef, 'open right brace');
is_deeply($glob2re->('*.[ch]'), '[^/]*?\\.[ch]', 'suffix glob');
is_deeply($glob2re->('{[a-z],9,}'), '([a-z]|9|)' , 'brace with range');