I am using Firefox::Marionette, and it works great (normally), but is now giving this error:

% perl -MFirefox::Marionette -e 'my $f=Firefox::Marionette->new()'
Undefined address for Socket::pack_sockaddr_in at /Users/<user>/perl5/
+lib/perl5/Firefox/Marionette.pm line 7134.

[download]

The line in question is this one: 

    $sock_addr =
      Socket::pack_sockaddr_in( $port, Socket::inet_aton($host) );

[download]

So I'm guessing that Socket::inet_aton($host) is the culprit

metacpan.org/pod/Socket tells us that:

...If passed a hostname that cannot be resolved, returns undef.

From this I'll assume that the hostname cannot be resolved, but we're not even opening a url yet...

Testing Socket yields predictable results:

% perl -MSocket -e'defined (my $a=inet_aton("garbage")) or die"dead"; 
+print unpack "V", $a;'
dead at -e line 1.
% perl -MSocket -e'defined (my $a=inet_aton("127.0.0.1")) or die"dead"
+; print unpack "V", $a;'
16777343

[download]

It seems to do its job when passed something sensible

I usually work from home, but today I went in to the office, and got the error.
Could this be caused by a change in the network?
I'll know later today if it works at home.

System details:

MacOS 14.5
Apple M2
perl ver. 5.34.2

I tried flushing cache with sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder, but this made no difference

I also tried changing the perl version (using plenv), but then I have to install Firefox::Marionette for the new version, and surprise-surprise; installation fails with the same error :p

Is this the right way to flush DNS on MacOS 14.5?

How can I find out what is actually passed to inet_aton when it fails?

What else can I do to debug this?

In reply to Undefined address for Socket::pack_sockaddr_in by WithABeard

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