From 72a17c5b246a1e2ac1871ded978979c370c4fa55 Mon Sep 17 00:00:00 2001
From: r-obert <robert@jazzonmymind.xyz>
Date: Fri, 23 Jun 2017 17:42:04 +0100
Subject: [PATCH] last_default might not be a Pry::Config::Memoized

---
 lib/pry/config/behavior.rb   |  1 +
 spec/config/behavior_spec.rb | 10 ++++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/pry/config/behavior.rb b/lib/pry/config/behavior.rb
index 5f86ce92..12c0c934 100644
--- a/lib/pry/config/behavior.rb
+++ b/lib/pry/config/behavior.rb
@@ -142,6 +142,7 @@ module Pry::Config::Behavior
 
   def eager_load!
     local_last_default = last_default
+    return if ! local_last_default.respond_to?(:memoized_methods)
     local_last_default.memoized_methods.each do |key|
       self[key] = local_last_default.public_send(key)
     end
diff --git a/spec/config/behavior_spec.rb b/spec/config/behavior_spec.rb
index 5f62991f..a6d46c8e 100644
--- a/spec/config/behavior_spec.rb
+++ b/spec/config/behavior_spec.rb
@@ -5,12 +5,18 @@ RSpec.describe Pry::Config::Behavior do
       include Pry::Config::Behavior
     end
   end
-  
+
   describe "#last_default" do
-    it "returns the last default in a list of defaults" do
+    it "returns the last default" do
       last = behavior.from_hash({}, nil)
       middle = behavior.from_hash({}, last)
       expect(behavior.from_hash({}, middle).last_default).to be(last)
     end
   end
+
+  describe "#eager_load!" do
+    it "returns nil when the default is nil" do
+      expect(behavior.from_hash({}, nil).eager_load!).to be(nil)
+    end
+  end
 end