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[perl #2743] perl -MO status
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From:
Father Chrysostomos via RT
Date:
January 11, 2012 13:17
Subject:
[perl #2743] perl -MO status
Message ID:
rt-3.6.HEAD-14510-1326316626-1111.2743-15-0@perl.org
On Tue Mar 28 03:39:03 2000, tchrist@chthon.perl.com wrote:
> I'm going through 5.6's perlcompile and trying all the examples,
> and many/most of them always/often have serious/fatal difficulties
> ranging from incorrect/spurious output to completely blowing up.
>
> Does this stuff have an owner?
>
> 1) With Deparse, virtually anything nontrivial gets me
>
> Can't call method "sibling" on an undefined value at
> lib/B/Deparse.pm line 257.
> CHECK failed--call queue aborted.
Robin Houston did a lot of work on B::Deparse before 5.8, so I’m going
to assume this is fixed, as I’ve never run into such problems.
>
> 2) Before Deprase dies, you often get a lot of these:
>
> Exiting subroutine via next at /opt/perl/5.005.6.0/lib/5.6.0/i686-
> linux/B/Deparse.pm lin
> e 257.
> Exiting subroutine via next at /opt/perl/5.005.6.0/lib/5.6.0/i686-
> linux/B/Deparse.pm lin
> e 257.
>
> 3) From Lint you can get this:
>
> Undefined value assigned to typeglob at lib/B/Lint.pm line 291.
$ perl5.8.8 -MO=Lint -we 'BEGIN { $::{""}=undef }'
Undefined value assigned to typeglob at
/usr/local/lib/perl5/5.8.8/darwin-thread-multi-2level/B/Lint.pm line 322.
-e syntax OK
$ perl5.8.9 -MO=Lint -we 'BEGIN { $::{""}=undef }'
-e syntax OK
> 4) And with Xref, this simple thing:
>
> sub start {
> my($self, $tag, $attr, $attrseq, $orig) = @_;
> if ($tag eq 'a' && exists $attr->{href}) {
> if ($attr->{href} =~ s/\Q$from/$to/g) {
> # must reconstruct the start tag based on $tag and $attr.
> # wish we instead were told the extent of the 'href' value
> # in $orig.
> my $tmp = "<$tag";
> for (@$attrseq) {
> my $encoded = encode_entities($attr->{$_});
> $tmp .= qq( $_="$encoded ");
> }
> $tmp .= ">";
> $self->output($tmp);
> return;
> }
> }
> $self->output($orig);
> }
>
> Produces this with Xref:
>
> Package (lexical)
> $attr i2, 3
> $attrseq i2, 9
> $encoded i10, 11
> $orig i2, &18, 18
> $self i2, 14, 18
> $tag i2, 3, 8
> $tmp i8, &14, 11, 13, 14
> %$attr 3, 4
> %%$attr 4, 10
> %%%$attr 10
> @$attrseq 9
>
> This %%%%% business is getting out of hand.
Same in 5.15.6.
--
Father Chrysostomos
---
via perlbug: queue: perl5 status: open
https://rt.perl.org:443/rt3/Ticket/Display.html?id=2743
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