Bugfix: Do not optimize away tags, they may be used elsewhere.

libevmcore/Assembly.cpp

@@ -274,8 +274,8 @@ Assembly& Assembly::optimise(bool _enable)
 	{
 		rules.push_back({ { Push, Push, i.first }, [&](AssemblyItemsConstRef m) -> AssemblyItems { return { i.second(m[1].data(), m[0].data()) }; } });
 		rules.push_back({ { Push, i.first, Push, i.first }, [&](AssemblyItemsConstRef m) -> AssemblyItems { return { i.second(m[2].data(), m[0].data()), i.first }; } });
-		rules.push_back({ { PushTag, Instruction::JUMP, Tag }, [&](AssemblyItemsConstRef m) -> AssemblyItems { if (m[0].m_data == m[2].m_data) return {}; else return m.toVector(); }});
 	}
+	rules.push_back({ { PushTag, Instruction::JUMP, Tag }, [&](AssemblyItemsConstRef m) -> AssemblyItems { if (m[0].m_data == m[2].m_data) return {m[2]}; else return m.toVector(); }});
 
 	copt << *this;