Bug#1014730: liburi-perl: Breaks apt-cacher with "Can't locate Regexp/IPv6.pm" error

[gregor herrmann]

On Mon, 11 Jul 2022 00:12:11 +0200, Robert Luberda wrote:

> The following information is printed into apt-cacher.log:
> Mon Jul 11 00:02:52 2022|error [18513]: Can't locate Regexp/IPv6.pm in @INC (you may need to install the Regexp::
> IPv6 module)

Thanks for your bug report.

I'm a bit surprised, because the new code in 5.11 should behave
better if Regexp::IPv6 is not available:

+our $IPv6_re;
+
+sub _looks_like_raw_ip6_address {
+  my $addr = shift;
+
+  if ( !$IPv6_re ) { #-- lazy / runs once / use Regexp::IPv6 if installed
+    eval {
+      require Regexp::IPv6;
+      Regexp::IPv6->import( qw($IPv6_re) );
+      1;
+    }  ||  do { $IPv6_re = qr/[:0-9a-f]{3,}/; }; #-- fallback: unambitious guess
+  }
+
+  return 0 unless $addr;
+  return 0 if $addr =~ tr/:/:/ < 2;  #-- fallback must not create false positive for IPv4:Port = 0:0
+  return 1 if $addr =~ /^$IPv6_re$/i;
+  return 0;
+}


But may as well move libregexp-ipv6-perl to Depends, I guess.


Cheers,
gregor

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