1 files changed, 6 insertions, 0 deletions
diff --git a/spec/ruby/core/enumerator/lazy/shared/collect_concat.rb b/spec/ruby/core/enumerator/lazy/shared/collect_concat.rb
index 26478f4ce0..e8ee4b6940 100644
--- a/spec/ruby/core/enumerator/lazy/shared/collect_concat.rb
+++ b/spec/ruby/core/enumerator/lazy/shared/collect_concat.rb
@@ -69,4 +69,10 @@ describe :enumerator_lazy_collect_concat, shared: true do
       end
     end
   end
+
+  it "works with an infinite enumerable" do
+    s = 0..Float::INFINITY
+    s.lazy.send(@method) { |n| [-n, +n] }.first(200).should ==
+      s.first(100).send(@method) { |n| [-n, +n] }.to_a
+  end
 end