A Change in Text::Template Induced by Coverage Analysis

• Deep inside Text::Template::fill_in() (line 257 in v1.44):

     my $fi_filename = _param('filename') || $fi_self->{FILENAME} || 'template';

• Coverage of this line:

     $ cover cover_db --report=text > TT.1.44.coverage.txt

     257   ***    107            66                  362     
     my $fi_filename = _param('filename') || $fi_self->{FILENAME} || 'template';

• 66 indicates only two-thirds of condition is covered

     or 3 conditions

     line  err      %      l  !l&&r !l&&!r   expr
     ----- --- ------ ------ ------ ------   ----
     ...
     257   ***     66      0      8     99   _param('filename') || $$fi_self{'FILENAME'}

• 0 under l: case in which first clause was true was never tested