From 30a690edbdf5ee64ea54afc7d0c91d910ff2b80e Mon Sep 17 00:00:00 2001
From: Kazuhiro NISHIYAMA <zn@mbf.nifty.com>
Date: Fri, 30 Aug 2019 12:49:27 +0900
Subject: Add guard as same as `==`

Try to fix failure at https://github.com/ruby/ruby/runs/207580232#step:10:382
```
       undefined method `name' for "Gemfile.lock":String
       /home/runner/work/ruby/ruby/lib/bundler/resolver/spec_group.rb:65:in `eql?'
```
---
 lib/bundler/resolver/spec_group.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/bundler/resolver/spec_group.rb b/lib/bundler/resolver/spec_group.rb
index 119f63b5c8..e5772eed81 100644
--- a/lib/bundler/resolver/spec_group.rb
+++ b/lib/bundler/resolver/spec_group.rb
@@ -62,6 +62,7 @@ module Bundler
       end
 
       def eql?(other)
+        return unless other.is_a?(SpecGroup)
         name.eql?(other.name) &&
           version.eql?(other.version) &&
           source.eql?(other.source)
-- 
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