Cygwin64: Rebase problems

[David Stacey]

On 02/11/2013 11:06, David Stacey wrote:
> I'm trying to reinstall 64-bit Cygwin, using a snapshot taken on 
> 2013-10-24. The post-install step goes into an infinite loop whilst 
> running 'texlive-collection-basic.sh': perl is attempting to load some 
> modules (IO.dll, MD5.dll, Fcnt.dll, Cwd.dll), which fail with rebase 
> errors. The script waits five seconds before trying (and failing) 
> again; this repeats ad infinitum.
>
> Here is an extract from the setup log:
>
>       0 [main] perl 3384 child_info_fork::abort: address space needed 
> by 'IO.dll' (0x300000) is already occupied
> Can't fork, trying again in 5 seconds at /usr/bin/updmap line 54.
>       0 [main] perl 3404 child_info_fork::abort: unable to remap 
> MD5.dll to same address as parent (0x2E0000) - try running rebaseall
> Can't fork, trying again in 5 seconds at /usr/bin/updmap line 54.
>       0 [main] perl 3452 child_info_fork::abort: address space needed 
> by 'IO.dll' (0x300000) is already occupied
> Can't fork, trying again in 5 seconds at /usr/bin/updmap line 54.
>       0 [main] perl 3456 child_info_fork::abort: address space needed 
> by 'IO.dll' (0x300000) is already occupied
> Can't fork, trying again in 5 seconds at /usr/bin/updmap line 54.
>       0 [main] perl 3408 child_info_fork::abort: unable to remap 
> Fcntl.dll to same address as parent (0x2F0000) - try running rebaseall
> Can't fork, trying again in 5 seconds at /usr/bin/updmap line 54.
>
> The error message suggests running rebaseall - however, 
> 'autorebase.bat' was run a few seconds earlier.
>
> I launched bash (from 'cmd') and ran 'rebase -si' and the results are 
> attached. There are two things to note. Firstly, a great many entries 
> have a base address of zero(!). Secondly, the last six entries in the 
> file have a rather large base address - I would expect the addresses 
> to start around 0x400000000 and decrease.
>
> If I delete '/etc/rebase.db.x86_64' and run 'rebaseall -p -v' then 
> everything seems to work OK - running 'rebase -si' gives sensible 
> output, and the 'texlive-collection-basic.sh' post-install script runs.

Neither 'rebase' nor 'dash' have changed since my last successful 
install - but 'setup-x86_64.exe' has changed. Clutching firmly to this 
straw, I tried version 2.819 - and this behaved in exactly the same way 
to version 2.830. Still, when you have eliminated the impossible...

'rebase' depends on 'grep', which /has/ changed recently. However, if 
'grep' was playing up then this list would be awash with complaints from 
confused users. No - it can't be that. My next step is to work 
backwards, starting with my snapshot and plodding backwards in time 
until I find the cause.

Dave.



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