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Re: Perl upgrade dilemma.



On Sun, Mar 08, 2009 at 01:21:07AM -0700, David L. Anselmi wrote:
> I'm trying to upgrade a testing machine but the upgrade failed around  
> perl-base.  Now any dpkg commands I try seem to fail because  
> /usr/bin/perl segfaults.
>
> How can I fix perl if I can't use dpkg?
>
> Here is the output from aptitude around the first failure:
>
>> Preparing to replace perl 5.10.0-18 (using .../perl_5.10.0-19_i386.deb) ...
>> Unpacking replacement perl ...
>> Preparing to replace perl-base 5.10.0-18 (using .../perl-base_5.10.0-19_i386.deb) ...
>> Unpacking replacement perl-base ...
>> Processing triggers for man-db ...
>> syntax error at -e line 1, near "3];"
>> syntax error at -e line 1, near "2];"
>> Missing right curly or square bracket at -e line 2, at end of line
>> Execution of -e aborted due to compilation errors.

Those errors seem to come from the man-db trigger. Which is in
/var/lib/dpkg/info/man-db.postinst and runs a perl scriptlet.

>> Setting up perl-base (5.10.0-19) ...
>
> It seems that the old /usr/bin/perl is still there so perhaps the  
> segfaults are because of library upgrades (libc6 was upgraded earlier in  
> the process).

How do you see that the old perl is still there?

>
> I tried reverting libc6 (2.7-18 to 2.7-16).  It seems odd that versions  
> that close would cause problems.  Reverting didn't work because dpkg  
> segfaults:
>
>> dpkg: error processing /var/cache/apt/archives/libc6_2.7-16_i386.deb (--install):
>>  subprocess pre-installation script killed by signal (Segmentation fault)
>
> Though libc6.preinst doesn't use perl.  Either I'm misunderstanding or  
> the problem is more general.
>
> Of course the above syntax errors (in man-db.postinst) don't really seem  
> to be errors.  And another system (similar but with many more packages)  
> upgraded cleanly.  So I'm at a loss why things would fail in the first  
> place.
>
> Thanks!
> Dave
>
>
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