Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Daniel Stender]

On 08.09.2015 13:51, Jakub Wilk wrote:
> Package: python-afl
> Version: 0.5-2
> 
> If you have python3-afl_0.2.1-1, and then install python-afl_0.5-2, you get:
> 
> update-alternatives: using /usr/share/python-afl/py-afl-fuzz to provide 
> /usr/bin/py-afl-fuzz (py-afl-fuzz) in auto mode
> update-alternatives: warning: not replacing /usr/bin/py-afl-fuzz with a link
> update-alternatives: warning: not replacing 
> /usr/share/man/man1/py-afl-fuzz.1.gz with a link
> 
> ...and you end up with the old py-afl-fuzz, which is not compatible with the 
> new afl module.
> 
> Suggested solution: use Breaks to make sure than python-afl and python3-afl 
> versions are always in sync.

Yep, breaks missing against the pre-alternatives package (0.2.1-1). Thanks for 
reporting this.

Daniel

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Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Jakub Wilk]

Package: python-afl
Version: 0.5-2

If you have python3-afl_0.2.1-1, and then install python-afl_0.5-2, you 
get:


update-alternatives: using /usr/share/python-afl/py-afl-fuzz to provide 
/usr/bin/py-afl-fuzz (py-afl-fuzz) in auto mode
update-alternatives: warning: not replacing /usr/bin/py-afl-fuzz with a link
update-alternatives: warning: not replacing 
/usr/share/man/man1/py-afl-fuzz.1.gz with a link

...and you end up with the old py-afl-fuzz, which is not compatible with 
the new afl module.


Suggested solution: use Breaks to make sure than python-afl and 
python3-afl versions are always in sync.


--
Jakub Wilk

Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Daniel Stender]

... or even better, as you suggest, always against older versions to get sure.

Daniel

-- 
4096R/DF5182C8
46CB 1CA8 9EA3 B743 7676 1DB9 15E0 9AF4 DF51 82C8
LPI certified Linux admin (LPI000329859 64mz6f7kt4)
http://www.danielstender.com/blog/

Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Daniel Stender]

We've got a problem here ... to keep the binaries aligned through breaks it 
would need
cross breaking, right?

I mean, python-afl 0.5-3 breaks python3-afl << 0.5-3 (and vice versa) to 
prevent the described problem:
python3-afl 0.5-3 couldn't be installed wrongfully at the side of python-afl 
0.2.1-1 with that (and
vice versa).

But that needs further action because that cross breaking prevents updating w/o 
previous uninstall:

$ sudo dpkg -i svn/build-area/python{,3}-afl_0.5-3_amd64.deb
{...}
 python-afl breaks python3-afl (<< 0.5-3)
  python3-afl (version 0.2.1-1) is present and installed.
{...}
 python3-afl breaks python-afl (<< 0.5.3)
  python-afl (version 0.2.1-1) is present and installed.


Better, versioned cross-*dependencies* of the binaries? Like,

$ sudo dpkg -i svn/build-area/python3-afl_0.5-3_amd64.deb
{...}
dpkg: dependency problems prevent configuration of python3-afl:
 python3-afl depends on python-afl (= 0.5-3); however:
  Version of python-afl on system is 0.2.1-1.


Not the ultimate rationale of having different binaries, but ... did I missed 
something?

Daniel

-- 
4096R/DF5182C8
46CB 1CA8 9EA3 B743 7676 1DB9 15E0 9AF4 DF51 82C8
LPI certified Linux admin (LPI000329859 64mz6f7kt4)
http://www.danielstender.com/blog/

Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Jakub Wilk]

* Daniel Stender , 2015-09-08, 15:43:
I mean, python-afl 0.5-3 breaks python3-afl << 0.5-3 (and vice versa) 
to prevent the described problem:
python3-afl 0.5-3 couldn't be installed wrongfully at the side of 
python-afl 0.2.1-1 with that (and vice versa).


Right.

But that needs further action because that cross breaking prevents 
updating w/o previous uninstall:


$ sudo dpkg -i svn/build-area/python{,3}-afl_0.5-3_amd64.deb
{...}
python-afl breaks python3-afl (<< 0.5-3)
 python3-afl (version 0.2.1-1) is present and installed.
{...}
python3-afl breaks python-afl (<< 0.5.3)
 python-afl (version 0.2.1-1) is present and installed.



Try passing --auto-deconfigure to dpkg. (This is what apt already does.)

--
Jakub Wilk

Bug#798354: warning: not replacing /usr/bin/py-afl-fuzz with a link

[Daniel Stender]

On 08.09.2015 16:05, Jakub Wilk wrote:
> * Daniel Stender , 2015-09-08, 15:43:
>> I mean, python-afl 0.5-3 breaks python3-afl << 0.5-3 (and vice versa) to 
>> prevent the described problem:
>> python3-afl 0.5-3 couldn't be installed wrongfully at the side of python-afl 
>> 0.2.1-1 with that (and vice versa).
> 
> Right.
> 
>> But that needs further action because that cross breaking prevents updating 
>> w/o previous uninstall:
>> 
>> $ sudo dpkg -i svn/build-area/python{,3}-afl_0.5-3_amd64.deb
>> {...}
>> python-afl breaks python3-afl (<< 0.5-3)
>>  python3-afl (version 0.2.1-1) is present and installed.
>> {...}
>> python3-afl breaks python-afl (<< 0.5.3)
>>  python-afl (version 0.2.1-1) is present and installed.
>> 
> 
> Try passing --auto-deconfigure to dpkg. (This is what apt already does.)

Ah, yes. All right. Thanks for hints and reporting the bug!

Dan

-- 
4096R/DF5182C8
46CB 1CA8 9EA3 B743 7676 1DB9 15E0 9AF4 DF51 82C8
LPI certified Linux admin (LPI000329859 64mz6f7kt4)
http://www.danielstender.com/blog/