Retrieved from: https://github.com/jordansissel/fpm/pull/1561.patch

From 956a218a7b35de08ea35da3b702ffdc716656b68 Mon Sep 17 00:00:00 2001
From: Jordan Sissel <jls@semicomplete.com>
Date: Mon, 15 Oct 2018 21:05:47 -0700
Subject: [PATCH] Check if an option has a default value before we try to look
 it up.

This fixes fpm when used with clamp 1.3.0 or above.

Fixes #1543
---
 lib/fpm/command.rb | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/fpm/command.rb b/lib/fpm/command.rb
index a204001e1..a99ddb627 100644
--- a/lib/fpm/command.rb
+++ b/lib/fpm/command.rb
@@ -394,7 +394,12 @@ def execute
     set = proc do |object, attribute|
       # if the package's attribute is currently nil *or* the flag setting for this
       # attribute is non-default, use the value.
-      if object.send(attribute).nil? || send(attribute) != send("default_#{attribute}")
+
+      # Not all options have a default value, so we assume `nil` if there's no default. (#1543)
+      # In clamp >= 1.3.0, options without `:default => ..` will not have any # `default_xyz` 
+      # methods generated, so we need to check for the presence of this method first.
+      default = respond_to?("default_#{attribute}") ? send("default_#{attribute}") : nil
+      if object.send(attribute).nil? || send(attribute) != default
         logger.info("Setting from flags: #{attribute}=#{send(attribute)}")
         object.send("#{attribute}=", send(attribute))
       end
ge'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/'>root</a>/<a href='/guix/log/gnu'>gnu</a>/<a href='/guix/log/gnu/system'>system</a>/<a href='/guix/log/gnu/system/setuid.scm'>setuid.scm</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/gnu/system/setuid.scm?showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-09-08 02:00:00 +0200'>2024-09-08</span></td><td><a href='/guix/commit/gnu/system/setuid.scm?id=0dd8e4c35109ed8bc2406a0bc13e18823a334937'>privilege: Add file-like-&gt;setuid-program helper.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/privilege.scm (file-like-&gt;setuid-program): New public
procedure.
* gnu/system/setuid.scm: Re-export it for compatibility.
(file-like-&gt;setuid-program): Remove this old version.
* gnu/services/docker.scm (singularity-setuid-programs): Use it (again).
* gnu/services/desktop.scm (enlightenment-privileged-programs): Likewise.

Change-Id: I8e41144438677a15cdadb3063651dbc780715497
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2024-08-11 02:00:00 +0200'>2024-08-11</span></td><td><a href='/guix/commit/gnu/system/setuid.scm?id=9099f8bdcc35025a00aaa9ab4169b7e5bbe7f00d'>system: (gnu system setuid) wraps (gnu system privilege).</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/system/setuid.scm (setuid-program): Rewrite as syntax to create a
&lt;privileged-program&gt; record that is setuid by default.
(setuid-program?, setuid-program-program, setuid-program-setuid?)
(setuid-program-setgid?, setuid-program-user, setuid-program-group):
Alias their privileged-program equivalent.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-07-29 13:09:48 -0400'>2021-07-29</span></td><td><a href='/guix/commit/gnu/system/setuid.scm?id=45235e67e4aeac96ad8d60265bef054990aeb425'>system: Add (gnu system setuid).</a><span class='msg-avail'>...<span class='msg-tooltip'>I flubbed and somehow when including the patch series, this got dropped.
Oops... should fix things again.

* gnu/system/setuid.scm: New file.
</span></span></td><td>Christopher Lemmer Webber</td></tr>