Bug#926392: licensecheck chokes on long lines

[Jonas Smedegaard]

Quoting gregor herrmann (2019-06-05 21:46:36)
> On Wed, 17 Apr 2019 07:08:00 +0000, Niels Thykier wrote:
> 
> > On Thu, 04 Apr 2019 18:13:43 +0200 Jonas Smedegaard <jonas at jones.dk> wrote:
> > > Quoting Sandro Mani (2019-04-04 13:36:28)
> > > > $ wget https://files.pythonhosted.org/packages/source/x/xonsh/xonsh-0.8.12.tar.gz
> > > > $ tar xf xonsh-0.8.12.tar.gz
> > > > $ licensecheck xonsh-0.8.12/xonsh/parser_table.py
> > > > 
> > > > => Licensecheck hangs eating cpu cycles (the file has lines with 
> > > > 33k and 71k characters).
> > > 
> > > Indeed. Thanks for reporting!
> 
> > I have been digging in the code (admittedly using the master branch 
> > of the libregexp-pattern-license-perl and licensecheck rather than 
> > the packages) and basically, it is a DOS from suboptimal regex.
> 
> Thanks for your investigation, Niels!

Agreed, thanks a lot for your investigation, Niels: I was _very_ happy 
when you posted it, but then got distracted by other business before 
getting around to replying back then - sorry!


> AFAICS this is the only buster-relevant RC bug we have.
>  
> 
> Jonas, my hope is that you have a chance to look into this issue, as
> you are also the upstream maintainer of this module :)

Yes, I will sure look into this.

It was not high on my list, however - I was under the impression that 
this does not affect Buster.

I will prioritize at least verifying that detail.


 - Jonas

-- 
 * Jonas Smedegaard - idealist & Internet-arkitekt
 * Tlf.: +45 40843136  Website: http://dr.jones.dk/

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