Log Message:
Update to 0.28
--------------
0.28    2015-08-18 15:00 UTC
        + Chg : SUB() and EVAL() will now warn if they cannot find an
                appropriate context in the current stack. They will still
                return undef in this case, which is interpreted as the current
                context when combined with other words.
        + Fix : [RT #104751] : Scope::Upper does not handle exotic stack types
                Trying to target a scope above the current perl scope will now
                result in a warning. In that case, the topmost context in the
                current stack will still be returned.
                Thanks Rafaël Garcia-Suarez for the report.
        + Fix : Test failures of threads tests on systems with harsh resource
                constraints causing the threads to exit() during run.
        + Opt : Some internal structures were shrunk, resulting in memory
                savings and small speedups.