From 7d8b5e45fc0fe22d7d520c7593d4dc9579047259 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lars=20Tobias=20Skjong-B=C3=B8rsting?=
 <larstobi@relatime.no>
Date: Sat, 20 Jan 2024 12:59:47 +0100
Subject: [PATCH] Fix undefined method `size' for nil:NilClass in
 network_defined?

---
 plugins/providers/docker/driver.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/plugins/providers/docker/driver.rb b/plugins/providers/docker/driver.rb
index 9811df0c619..1dd5e2021f8 100644
--- a/plugins/providers/docker/driver.rb
+++ b/plugins/providers/docker/driver.rb
@@ -349,7 +349,8 @@ def network_defined?(subnet_string)
         network_info = inspect_network(all_networks)
         network_info.each do |network|
           config = network["IPAM"]["Config"]
-          if (config.size > 0 &&
+          if (defined?(config.size) &&
+            config.size > 0 &&
             config.first["Subnet"] == subnet_string)
             @logger.debug("Found existing network #{network["Name"]} already configured with #{subnet_string}")
             return network["Name"]