TypeError: line.match is not a function or its return value is not iterable

[schumannd]

This does not crash the app

TypeError: line.match is not a function or its return value is not iterable
    at Object.parseMemoryMetrics (/usr/lib/node_modules/node-heroku-cloudwatch-drain/src/parseMetrics.js:16:11)
    at /usr/lib/node_modules/node-heroku-cloudwatch-drain/src/index.js:47:16
    at messages.forEach.message (/usr/lib/node_modules/node-heroku-cloudwatch-drain/src/setupExpress.js:31:32)
    at Array.forEach (<anonymous>)
    at /usr/lib/node_modules/node-heroku-cloudwatch-drain/src/setupExpress.js:31:13
    at Layer.handle [as handle_request] (/usr/lib/node_modules/node-heroku-cloudwatch-drain/node_modules/express/lib/router/layer.js:95:5)
    at next (/usr/lib/node_modules/node-heroku-cloudwatch-drain/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/usr/lib/node_modules/node-heroku-cloudwatch-drain/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/usr/lib/node_modules/node-heroku-cloudwatch-drain/node_modules/express/lib/router/layer.js:95:5)
    at /usr/lib/node_modules/node-heroku-cloudwatch-drain/node_modules/express/lib/router/index.js:281:22