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-rw-r--r--test/ruby/test_struct.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/test/ruby/test_struct.rb b/test/ruby/test_struct.rb
index df859f75cb..e0c3b5f406 100644
--- a/test/ruby/test_struct.rb
+++ b/test/ruby/test_struct.rb
@@ -353,6 +353,13 @@ module TestStruct
assert_equal "[Bug #9353]", x.send(:a=, "[Bug #9353]")
end
+ def test_new_dupilicate
+ bug12291 = '[ruby-core:74971] [Bug #12291]'
+ assert_raise_with_message(ArgumentError, /duplicate member/, bug12291) {
+ @Struct.new(:a, :a)
+ }
+ end
+
class TopStruct < Test::Unit::TestCase
include TestStruct