1 files changed, 13 insertions, 0 deletions
diff --git a/spec/ruby/core/exception/dup_spec.rb b/spec/ruby/core/exception/dup_spec.rb
index 3ad1fc063b..c7fcd280dd 100644
--- a/spec/ruby/core/exception/dup_spec.rb
+++ b/spec/ruby/core/exception/dup_spec.rb
@@ -58,4 +58,17 @@ describe "Exception#dup" do
 
     @obj.dup.backtrace.should == @obj.backtrace
   end
+
+  it "does copy the cause" do
+    begin
+      raise StandardError, "the cause"
+    rescue StandardError => cause
+      begin
+        raise RuntimeError, "the consequence"
+      rescue RuntimeError => e
+        e.cause.should equal(cause)
+        e.dup.cause.should equal(cause)
+      end
+    end
+  end
 end