https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=22497
Bug ID: 22497
Summary: '0' width can lead to an infinite loop.
Change sponsored?: ---
Product: Koha
Version: master
Hardware: All
OS: All
Status: NEW
Severity: major
Priority: P5 - low
Component: Label/patron card printing
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
Target Milestone: ---
> > "Aha... it's the parentheses which are the problem. They're being
> > interpreted as
> > regex metacharacters and not literal values!"
>
> We noticed that there seems to be an infinite loop if the template has some
> or all entries with "0" in it (like in default when creating a new
> template). Could this be the same cause?
Sorry, I just realized that you were referring to the template rather than the
layout.
Yes, it would be a related problem, but a separate issue.
If 'label_width' is 0, then $self->{'width'} will be 0.
That means that this condition will be triggered:
if (($string_width + $text_attribs->{'llx'}) > $self->{'width'})
And because $self->{'width'} is 0, then the following condition would never
feasibly be triggered:
if (($string_width + $text_attribs->{'llx'}) < $self->{'width'})
And this condition is the only thing that can stop the infinite loop.
Really the line wrapping code looks like it would benefit from a re-write.
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