[rubygems/rubygems] Handle empty array

https://github.com/rubygems/rubygems/commit/7c0afdd9af

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/rubygems/yaml_serializer.rb b/lib/rubygems/yaml_serializer.rb
index 5847628514..209bc4718b 100644
--- a/lib/rubygems/yaml_serializer.rb
+++ b/lib/rubygems/yaml_serializer.rb
@@ -17,7 +17,11 @@ module Gem
         if v.is_a?(Hash)
           yaml << dump_hash(v).gsub(/^(?!$)/, "  ") # indent all non-empty lines
         elsif v.is_a?(Array) # Expected to be array of strings
-          yaml << "\n- " << v.map {|s| s.to_s.gsub(/\s+/, " ").inspect }.join("\n- ") << "\n"
+          if v.empty?
+            yaml << " []\n"
+          else
+            yaml << "\n- " << v.map {|s| s.to_s.gsub(/\s+/, " ").inspect }.join("\n- ") << "\n"
+          end
         else
           yaml << " " << v.to_s.gsub(/\s+/, " ").inspect << "\n"
         end
@@ -63,6 +67,7 @@ module Gem
             last_empty_key = key
             last_hash = stack[depth]
           else
+            val = [] if val == "[]" # empty array
             stack[depth][key] = val
           end
         elsif match = ARRAY_REGEX.match(line)