Thread: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

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[htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Marcin G. <mg...@fo...> - 2007-05-02 12:44:46

One in every few calls to my application ends with error  desctribed below.
I'm not sure when it started or what stared these errors.
It doesn't  depend on template, number of calls or something else, seems 
pretty random.
Important: turning off cache seems to heal it.

H::T version 2.9
H::T::Expr version 0.07

Not an ARRAY reference 
at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Template/Expr.pm line 238.


Expr.pm snippet:

sub output {
  my $self = shift;
  my $parse_stack = $self->{parse_stack};
  my $options = $self->{options};
  my ($expr, $expr_func);

  # pull expr and expr_func out of the parse_stack for cache mode.
  if ($options->{cache}) {
    $expr      = pop @$parse_stack;
    $expr_func = pop @$parse_stack;
  } else {
    $expr      = $options->{expr};
    $expr_func = $options->{expr_func};
  }

  # setup expression evaluators
  my %param;
  for (my $x = 0; $x < @$expr; $x++) { 	# <---- l. 238 is HERE -----------
    my $node = $expr->[$x];
    $param{"__expr_" . $x . "__"} = sub { _expr_evaluate($node, @_) };
  }
  $self->param(\%param);



I dumped variables before the loop and got this

about $expr:

type = SCALAR
value = SCALAR(0xfc7a2a0)
value2 = "<br>
               on-line: <b>"


I can provide more info but not sure what's important.
best regards
-- 
Marcin Gryszkalis, PGP 0x9F183FA3 
jabber jid:mg...@fo..., gg:2532994
http://the.fork.pl

Re: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Mathew R. <mat...@ne...> - 2007-05-03 01:35:50

Hi Marcin,

Are you using a filter by any chance?  If so, you could try temporarily
disabling it and/or could you post a code snippet if its use.

Mathew


Marcin Gryszkalis wrote:
> One in every few calls to my application ends with error  desctribed below.
> I'm not sure when it started or what stared these errors.
> It doesn't  depend on template, number of calls or something else, seems 
> pretty random.
> Important: turning off cache seems to heal it.
>
> H::T version 2.9
> H::T::Expr version 0.07
>
> Not an ARRAY reference 
> at /usr/local/lib/perl5/site_perl/5.8.8/HTML/Template/Expr.pm line 238.
>
>
> Expr.pm snippet:
>
> sub output {
>   my $self = shift;
>   my $parse_stack = $self->{parse_stack};
>   my $options = $self->{options};
>   my ($expr, $expr_func);
>
>   # pull expr and expr_func out of the parse_stack for cache mode.
>   if ($options->{cache}) {
>     $expr      = pop @$parse_stack;
>     $expr_func = pop @$parse_stack;
>   } else {
>     $expr      = $options->{expr};
>     $expr_func = $options->{expr_func};
>   }
>
>   # setup expression evaluators
>   my %param;
>   for (my $x = 0; $x < @$expr; $x++) { 	# <---- l. 238 is HERE -----------
>     my $node = $expr->[$x];
>     $param{"__expr_" . $x . "__"} = sub { _expr_evaluate($node, @_) };
>   }
>   $self->param(\%param);
>
>
>
> I dumped variables before the loop and got this
>
> about $expr:
>
> type = SCALAR
> value = SCALAR(0xfc7a2a0)
> value2 = "<br>
>                on-line: <b>"
>
>
> I can provide more info but not sure what's important.
> best regards
>

Re: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Marcin G. <mg...@fo...> - 2007-05-03 09:28:19

On Thursday of May 3 2007, Mathew Robertson wrote:
> Are you using a filter by any chance?  If so, you could try temporarily
> disabling it and/or could you post a code snippet if its use.

Sorry, no filters.


I dumped $parse_stack and it's like this (parts of html skipped - (...)), but 
it's all messy, not sure if you can get anything from this...

STACK:$VAR1 = [
          \'<html>
(...)
		<link rel="stylesheet" href="/others/all.css">
        ',
          bless( [
                   bless( do{\(my $o = undef)}, 'HTML::Template::VAR' ),
                   0,
                   0,
                   '3',
                   0
                 ], 'HTML::Template::COND' ),
          \'
            <link rel="stylesheet" href="/others/ajax.css">
            <script src="/others/ajax_kl.js"></script>
        ',
          bless( do{\(my $o = undef)}, 'HTML::Template::NOOP' ),
          \'
        <link rel="shortcut icon" href="/favicon.ico" >
(...)
<br>
                ',
          bless( [
                   bless( do{\(my $o = '1')}, 'HTML::Template::VAR' ),
                   0,
                   0,
                   '7',
                   0
                 ], 'HTML::Template::COND' ),
          \'
                        <a href=
(...)
</a>&nbsp;&nbsp;
                ',
          $VAR1->[3],
          \'<br>
                        on-line: <b>'
        ];

-- 
Marcin Gryszkalis, PGP 0x9F183FA3 
jabber jid:mg...@fo..., gg:2532994
http://the.fork.pl

Re: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Marcin G. <mg...@fo...> - 2007-06-01 11:55:49

On Friday of June 1 2007, you wrote:
> Did you ever resolve this?   After looking at the problem again, I
> suspect that some variable was being set/used incorrectly, ie: a scalar
> was being set on the param, but trying to be used in a loop -> or more
> specifically vice versa inside an EXPR...

Unfortunately - no, the only way to solve it is to turn off cache, I use 
following options:

my %default_options = (
    die_on_bad_params => 0,
    search_path_on_include => 1,
    loop_context_vars => 1,
    global_vars => 1,
    strict => 1,
    cache => 1,
);


after I set cache=>0 the errors don't show anymore (with cache on they show 
randomly, like once every 10-20 calls - with the same almost static (just 
several includes) page)...

Any help or directions how to debug this will be appreciated.
greetings
-- 
Marcin Gryszkalis, PGP 0x9F183FA3 
jabber jid:mg...@fo..., gg:2532994
http://the.fork.pl

Re: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Mathew R. <mat...@ne...> - 2007-06-26 06:36:48

Hi Marcin,

This has been sitting in my inbox for a while, but I didn't really have
an ideas.

Have you tried enabling the file_cache only (ie not the memory cache)? 
It may help nail whether the problem is with H::T or something else.

regards,
Mathew Robertson

Marcin Gryszkalis wrote:
> On Friday of June 1 2007, you wrote:
>   
>> Did you ever resolve this?   After looking at the problem again, I
>> suspect that some variable was being set/used incorrectly, ie: a scalar
>> was being set on the param, but trying to be used in a loop -> or more
>> specifically vice versa inside an EXPR...
>>     
>
> Unfortunately - no, the only way to solve it is to turn off cache, I use 
> following options:
>
> my %default_options = (
>     die_on_bad_params => 0,
>     search_path_on_include => 1,
>     loop_context_vars => 1,
>     global_vars => 1,
>     strict => 1,
>     cache => 1,
> );
>
>
> after I set cache=>0 the errors don't show anymore (with cache on they show 
> randomly, like once every 10-20 calls - with the same almost static (just 
> several includes) page)...
>
> Any help or directions how to debug this will be appreciated.
> greetings
>

Re: [htmltmpl] problem: Not an ARRAY reference in Expr.pm

From: Marcin G. <mg...@fo...> - 2007-06-26 07:00:51

Hi Matthew

On Tuesday of June 26 2007, you wrote:
> Have you tried enabling the file_cache only (ie not the memory cache)?
> It may help nail whether the problem is with H::T or something else.

The HTML::Template::Expr says (in caveats section):

"The module won't work with HTML::Template's file_cache or shared_cache modes, 
but normal memory caching should work. I hope to address this is a future 
version."

Is above still valid or something got fixed and I can use file cache?

greetings
-- 
Marcin Gryszkalis, PGP 0x9F183FA3 
jabber jid:mg...@fo..., gg:2532994
http://the.fork.pl