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-rw-r--r--lib/bundler/graph.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/bundler/graph.rb b/lib/bundler/graph.rb
index e145590430..de6bba0214 100644
--- a/lib/bundler/graph.rb
+++ b/lib/bundler/graph.rb
@@ -1,4 +1,5 @@
# frozen_string_literal: true
+
require "set"
module Bundler
class Graph