perl-net-dns-resolver-programmable used the undocumented and internal
method Net::DNS::rcodesbyname [0], and that interface is no longer
exposed.

This patch, copied from [1], makes the program check for the existence
of the method before trying to use it.

[0]
<https://rt.cpan.org/Public/Bug/Display.html?id=95901>

[1]
<https://rt.cpan.org/Public/Bug/Display.html?id=95901#txn-1575108>

diff --git a/lib/Net/DNS/Resolver/Programmable.pm b/lib/Net/DNS/Resolver/Programmable.pm
index 1af72ce..e09a2f0 100644
--- a/lib/Net/DNS/Resolver/Programmable.pm
+++ b/lib/Net/DNS/Resolver/Programmable.pm
@@ -203,8 +203,10 @@ sub send {
     if (defined(my $resolver_code = $self->{resolver_code})) {
         ($result, $aa, @answer_rrs) = $resolver_code->($domain, $rr_type, $class);
     }
-    
-    if (not defined($result) or defined($Net::DNS::rcodesbyname{$result})) {
+
+    if (not defined($result)
+         or defined($Net::DNS::Parameters::rcodebyname{$result})
+         or defined($Net::DNS::rcodesbyname{$result})) {
         # Valid RCODE, return a packet:
         
         $aa     = TRUE      if not defined($aa);
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<div class='path'>path: <a href='/guix/log/?id=60953d62c0e7975aab616b07c6e9c98b687e168a'>root</a>/<a href='/guix/log/etc?id=60953d62c0e7975aab616b07c6e9c98b687e168a'>etc</a>/<a href='/guix/log/etc/guix-daemon.cil.in?id=60953d62c0e7975aab616b07c6e9c98b687e168a'>guix-daemon.cil.in</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/guix-daemon.cil.in?id=60953d62c0e7975aab616b07c6e9c98b687e168a&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-05-25 12:51:15 +0200'>2023-05-25</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=3bf612eaa13cc39caab64567660b8a02d206d19a'>etc: SELinux: Update policy file.</a><span class='msg-avail'>...<span class='msg-tooltip'>Tested on Rocky Linux 9, as discussed
at &lt;https://issues.guix.gnu.org/62487&gt;.

* etc/guix-daemon.cil.in: Add rules for /gnu/store remount and file
creation in /tmp.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-12-23 20:20:06 +0100'>2022-12-23</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=afaeb657b118e6998342110deab8c8110b824417'>etc: SELinux: Allow init process to setattr on profile directories.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in: Add rule.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-12-23 20:20:06 +0100'>2022-12-23</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=4a134ed32e69ba888d988d2ed924a1531a54551b'>etc: SELinux: Allow daemon to search run state directories.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in: Import types init_var_run_t and
system_dbusd_var_run_t; add rules.
</span></span></td><td>Ricardo Wurmus</td></tr>
<tr><td><span title='2022-12-23 20:20:06 +0100'>2022-12-23</span></td><td><a href='/guix/commit/etc/guix-daemon.cil.in?id=f28d792719abb82cc920486e6d6f14eacc44370c'>etc: SELinux: Label guix-daemon executable in profile.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/guix-daemon.cil.in: Add file rule for "guix-daemon" in current-guix
profile.
</span></span></td><td>Ricardo Wurmus</td></tr>