Bug#962019: perl: arch:all build fails on buildd (transient error?)

[Niko Tyni]

Control: clone -1 -2
Control: reassign -2 libio-socket-ip-perl 0.39-1
Control: tag -2 bullseye sid
Control: retitle -2 libio-socket-ip-perl: fails to build on IPv6-only buildds
Control: found -1 5.30.2-1
Control: block -1 with -2

On Tue, Jun 02, 2020 at 11:04:28AM +0200, Julien Cristau wrote:
> Control: tag -1 patch
> 
> On Tue, Jun 02, 2020 at 08:09:43AM +0200, Salvatore Bonaccorso wrote:
> > On Tue, Jun 02, 2020 at 06:40:41AM +0200, Salvatore Bonaccorso wrote:
> > > Source: perl
> > > Version: 5.30.3-1
> > > Severity: serious
> > > Justification: FTBFS
> > > 
> > > Hi Dom an Niko
> > > 
> > > Guess you have seen it but filling a bug for tracking. arch:all build
> > > failed on buildd:
> > > 
> > > https://buildd.debian.org/status/fetch.php?pkg=perl&arch=all&ver=5.30.3-1&stamp=1591057198&raw=0
> > 
> > FTR, the issue is that the build got picked up by a IPv6-only enabled
> > buildd.
> 
> FWIW, it seems IO::Socket::IP passes AI_ADDRCONFIG to getaddrinfo, which
> then doesn't return ipv4 addresses because the host doesn't have
> non-local ones, even though the address we're trying to resolve is
> "127.0.0.1".
> 
> Passing either GetAddrInfoFlags => AI_NUMERICHOST or GetAddrInfoFlags =>
> 0 to both IO::Socket::IP->new calls in the test file lets it pass, by
> turning off the smarts in getaddrinfo.

Thanks.

The immediate concern has been solved by rescheduling the failed builds on
different buildd hosts.

As this wasn't broken by a change in perl, I'm marking it found in the
current version in testing too so as not to block testing migration
of 5.30.3-1. It still needs to be fixed, of course.

I'm also cloning a separate bug for libio-socket-ip-perl, which has the
same tests. I've verified that it also fails to build in the same way.

FWIW, an easy way to test this is

# unshare -n
# ip li set lo up
# ip dev add dummy0 type dummy
# ip li set dummy0 up

It's probably best to fix libio-socket-ip-perl first as it's self
contained, and then copy the fix over to src:perl.

-- 
Niko Tyni   ntyni at debian.org