This is another of RT #128156 https://rt.perl.org/Public/Bug/Display.html?id=128156
On Sat, Jun 11, 2016 at 4:27 AM via RT <perl6-bugs-follo...@perl.org> wrote: > # New Ticket Created by > # Please include the string: [perl #128371] > # in the subject line of all future correspondence about this issue. > # <URL: https://rt.perl.org/Ticket/Display.html?id=128371 > > > > This bug is a touch complex. > > First, file layout - > > bug/bin/perl6-prolog-lrep > bug/lib/Prolog/{Actions.pm6,Grammar.pm6,LREP.pm6} > > As it stands, running: > > perl6 -Ilib bin/perl6-prolog-lrep > > # displays the prompt '> ' with Linenoise. > > Perl6 precompiles the .pm6 modules so things will run faster next time. > Now, open Grammar.pm and add a '#" comment at the point marked '#^-- Add > a comment here, rerun bin/perl6-prolog-lrep'. > > Rerun bin/perl6-prolog-lrep, and now you get this random-seeming error > message: > > --cut here-- > Could not find symbol '&here' > in block <unit> at bin/perl6-prolog-lrep line 5 > > Actually thrown at: > in block <unit> at bin/perl6-prolog-lrep line 5 > --cut here-- > > Delete the lib/.precomp directory and the problem goes away. > > I suspect the precompilation routines should expire the old .precomp > files, but aren't because the change is in a 'grammar' block, and not a > 'class' block. I have no proof of that, but that's my suspicion. > > If you have questions, the easiest way to get hold of me is on IRC. >
