On Sunday, 16 Jul 2017 at 15:59 UTC
Guido Günther wrote:

> control: reassign -1 calibre
> 
> Hi,
> On Sun, Jul 16, 2017 at 05:33:53PM +0200, Manolo Díaz wrote:
> > On Sunday, 16 Jul 2017 at 15:24 UTC
> > Guido Günther wrote:
>   >   
> > > Hi,
> > > On Sun, Jul 16, 2017 at 05:12:28PM +0200, Manolo Díaz wrote:  
> > > > On Sunday, 16 Jul 2017 at 11:27 UTC
> > > > Guido Günther wrote:
> > > >     
> > > > > Hi,
> > > > > On Sun, Jul 16, 2017 at 11:22:47AM +0200, Manolo Díaz wrote:    
> > > > > > On Sunday, 16 Jul 2017 at 09:05 UTC
> > > > > > Guido Günther wrote:
> > > > > >       
> > > > > > > Hi,
> > > > > > > control: affects -1 calibre      
> > > > > > 
> > > > > >     [...]
> > > > > >       
> > > > > > > Starts here without problems. Does
> > > > > > > 
> > > > > > >      python -c "from six.moves import _thread"
> > > > > > > 
> > > > > > > work for you? If it does not work your python-six is broken. 
> > > > > > > Maybe you
> > > > > > > have a local version of six lying around?
> > > > > > > Cheers,
> > > > > > >  -- Guido      
> > > > > > 
> > > > > > Hi,
> > > > > > 
> > > > > > python -c "from six.moves import _thread" does apparently nothing 
> > > > > > and
> > > > > > exits with 0. Is this expected?
> > > > > >      
> > > > > 
> > > > > Yept. That's how it should be.
> > > > >     
> > > > > > The version of python-six on my system is 1.10.0-4 (current testing)
> > > > > > and if it was broken I think calibre wouldn't start with only
> > > > > > downgrading python-dateutil.      
> > > > > 
> > > > > It might because the old python-dateutil version might not have used 
> > > > > it.
> > > > > Can you do a
> > > > > 
> > > > >    strace -f -s2048 /usr/bin/calibre
> > > > > 
> > > > > and attach this to the bugreport please.
> > > > > Cheers,
> > > > >  -- Guido    
> > > > 
> > > > Of course. It's attached.    
> > > 
> > > You have six.pyc in the calibre directory that's tripping up things:
> > > 
> > > open("/usr/lib/calibre/six.pyc", O_RDONLY) = 9
> > > 
> > > can you remove that and try again?
> > > Cheers,
> > >  -- Guido  
> > 
> > It works. After removing /usr/lib/calibre/six.pyc calibre works again.
> > So you are right, it's not a python-datetime bug.  
> 
> So calibre should clean up *.pyc files (probably from ancient
> installations) in /usr/lib/calibre.
> Cheers,
>  -- Guido

It would help, but I think it isn't enough. Given the following
sequence calibre would have failed to start.

- upgrade or reinstall calibre (all *.pyc are cleaned up)
- run calibre as root (they are created again)
- upgrade python-dateutil.

Thanks again.

Regards,
-- 
Manolo Díaz

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