Contain a throw from the application's logger instead of letting it escape

src/log.ts

@@ -20,3 +20,26 @@ export const silentLog: SmppLog = {
 	verbose: noop,
 	warn: noop,
 };
+
+function contained(log: SmppLog, method: keyof SmppLog): LogMethod {
+	return (msg, metadata) => {
+		try {
+			log[method](msg, metadata);
+		} catch {
+			// Reporting a broken logger would need a logger, and hard rule 1 outranks the report.
+		}
+	};
+}
+
+/** The application's logger with a throw from it contained, or silence when it supplied none. */
+export function guardedLog(log?: SmppLog): SmppLog {
+	if (log === undefined) return silentLog;
+
+	return {
+		debug: contained(log, 'debug'),
+		error: contained(log, 'error'),
+		info: contained(log, 'info'),
+		verbose: contained(log, 'verbose'),
+		warn: contained(log, 'warn'),
+	};
+}