Recently, Perl 5.28 has been released
. This gives us the opportunity to check for problems, and eliminate all new warnings it creates before it hits the Linux distributions or Strawberry Perl
See also Item7797
, which fixed all new warnings up to Perl 5.26.
The test suite, including the compile-all tests, runs without warnings under Perl 5.28 for the core and the default plugins. I have been running a TWiki from SVN under Perl 5.28 since a week without spotting errors. There were warnings, which again came from a different interpretation of which unescaped braces need to be escaped, which are - as far as the code coverage goes - are fixed.