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fix: potential resource leak
fix: potential resource leak
panic: runtime error: invalid memory address or nil pointer dereference when closing Forwarder with nil Listener
fix: add nil check in Forwarder.Close to avoid panic (issue #36)
fix: add nil check in Forwarder.Close to avoid panic (issue #36)
panic: runtime error: invalid memory address or nil pointer dereference when closing Forwarder with nil Listener