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-rw-r--r--mrblib/error.rb7
1 files changed, 7 insertions, 0 deletions
diff --git a/mrblib/error.rb b/mrblib/error.rb
index 5660d8235..3fa7f21e3 100644
--- a/mrblib/error.rb
+++ b/mrblib/error.rb
@@ -12,3 +12,10 @@ class Exception
self.new(*args, &block)
end
end
+
+# ISO 15.2.37
+class ScriptError < Exception
+end
+
+class NotImplementedError < ScriptError
+end