[CHEF-4596] Avoid | operator when merging arrays to avoid deduplication.ssd/CHEF-4596

1 files changed, 3 insertions, 1 deletions

diff --git a/chef/lib/chef/mixin/deep_merge.rb b/chef/lib/chef/mixin/deep_merge.rb
index dd6e946ba1..55ca521a6f 100644
--- a/chef/lib/chef/mixin/deep_merge.rb
+++ b/chef/lib/chef/mixin/deep_merge.rb
@@ -181,7 +181,9 @@ class Chef
               puts if merge_debug
             end
             puts "#{di} merging arrays: #{source.inspect} :: #{dest.inspect}" if merge_debug
-            dest = dest | source
+            source.each do |i|
+              dest << i unless dest.include?(i)
+            end
             dest.sort! if sort_merged_arrays
           elsif overwrite_unmergeable
             puts "#{di} overwriting dest: #{source.inspect} -over-> #{dest.inspect}" if merge_debug