Gatsby: live reloading breaks after I edit a markdown file 2 times (first time works somehow)

Created on 14 Aug 2018 · 3Comments · Source: gatsbyjs/gatsby

Description

Running gatsby develop and editing markdown file second time is causing page component to not get any data and cause runtime errors:

Steps to reproduce

Clone https://github.com/NickyMeuleman/nicky-blog
Install dependencies and run npm run develop
edit src/pages/lint-css/index.md and save
first edit doesn't cause errors and content is updated
edit src/pages/lint-css/index.md and save again
we get browser errors, data (graphql results) are not passed to page component

Expected result

Page should be updated without errors

Actual result

We get browser error in console:

Browser errors

Uncaught TypeError: Cannot read property 'markdownRemark' of undefined at BlogPostTemplate (VM2221 blog-post.js:37) at ProxyComponent.hotComponentRender (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:618) at ProxyComponent.proxiedRender (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:635) at finishClassComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13194) at updateClassComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13156) at beginWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13825) at performUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864) at workLoop (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903) at HTMLUnknownElement.callCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100) at Object.invokeGuardedCallbackDev (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138) at invokeGuardedCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187) at replayUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15311) at renderRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15963) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83) BlogPostTemplate @ D:/Projects/nicky-blog/src/templates/blog-post.js:37 hotComponentRender @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:618 proxiedRender @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:635 finishClassComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13194 updateClassComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13156 beginWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13825 performUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864 workLoop @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 replayUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15311 renderRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15963 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 The above error occurred in the component: in BlogPostTemplate (created by PageRenderer) in PageRenderer (at json-store.js:93) in JSONStore (created by RouteHandler) in ScrollContext (at root.js:82) in RouteHandler (created by Root) in div (created by FocusHandlerImpl) in FocusHandlerImpl in FocusHandler (created by RouterImpl) in RouterImpl (created by LocationProvider) in LocationProvider in Location in Router (created by Root) in Root (created by HotExportedRoot) in AppContainer (created by HotExportedRoot) in HotExportedRoot (at app.js:55) React will try to recreate this component tree from scratch using the error boundary you provided, LocationProvider. __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 logCapturedError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14227 logError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14266 callback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14948 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10879 commitUpdateQueue @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10923 commitLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14378 commitAllLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15463 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 commitRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604 completeRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/@reach/router/es/index.js:123 Uncaught TypeError: Cannot read property 'markdownRemark' of undefined at BlogPostTemplate (VM2221 blog-post.js:37) at ProxyComponent.hotComponentRender (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:618) at ProxyComponent.proxiedRender (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:635) at finishClassComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13194) at updateClassComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13156) at beginWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13825) at performUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864) at workLoop (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903) at renderRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15943) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83) BlogPostTemplate @ D:/Projects/nicky-blog/src/templates/blog-post.js:37 hotComponentRender @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:618 proxiedRender @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:635 finishClassComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13194 updateClassComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13156 beginWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13825 performUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864 workLoop @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903 renderRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15943 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 The above error occurred in the component: in LocationProvider in Location in Router (created by Root) in Root (created by HotExportedRoot) in AppContainer (created by HotExportedRoot) in HotExportedRoot (at app.js:55) React will try to recreate this component tree from scratch using the error boundary you provided, AppContainer. __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 logCapturedError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14227 logError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14266 callback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14948 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10879 commitUpdateQueue @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10912 commitLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14378 commitAllLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15463 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 commitRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604 completeRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 Error: A cross-origin error was thrown. React doesn't have access to the actual error object in development. See https://fb.me/react-crossorigin-error for more information. at Object.invokeGuardedCallbackDev (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:145) at invokeGuardedCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187) at commitRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604) at completeRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83) __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 error @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:188 componentDidCatch @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:1567 componentDidCatch @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:580 callback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14949 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10879 commitUpdateQueue @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10912 commitLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14378 commitAllLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15463 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 commitRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604 completeRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/src/templates/blog-post.js:37 Uncaught TypeError: Cannot read property 'markdownRemark' of undefined at BlogPostTemplate (VM2221 blog-post.js:37) at ProxyFacade (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:675) at mountIndeterminateComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13381) at beginWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13821) at performUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864) at workLoop (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903) at HTMLUnknownElement.callCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100) at Object.invokeGuardedCallbackDev (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138) at invokeGuardedCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187) at replayUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15311) at renderRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15963) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83) BlogPostTemplate @ D:/Projects/nicky-blog/src/templates/blog-post.js:37 BlogPostTemplate @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:675 mountIndeterminateComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13381 beginWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13821 performUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864 workLoop @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 replayUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15311 renderRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15963 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 The above error occurred in the component: in BlogPostTemplate (created by PageRenderer) in PageRenderer (at json-store.js:93) in JSONStore (created by RouteHandler) in ScrollContext (at root.js:82) in RouteHandler (created by Root) in div (created by FocusHandlerImpl) in FocusHandlerImpl in FocusHandler (created by RouterImpl) in RouterImpl (created by LocationProvider) in LocationProvider in Location in Router (created by Root) in Root (created by HotExportedRoot) in AppContainer (created by HotExportedRoot) in HotExportedRoot (at app.js:55) React will try to recreate this component tree from scratch using the error boundary you provided, LocationProvider. __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 logCapturedError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14227 logError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14266 callback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14948 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10879 commitUpdateQueue @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10923 commitLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14378 commitAllLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15463 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 commitRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604 completeRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/@reach/router/es/index.js:123 Uncaught TypeError: Cannot read property 'markdownRemark' of undefined at BlogPostTemplate (VM2221 blog-post.js:37) at ProxyFacade (D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:675) at mountIndeterminateComponent (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13381) at beginWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13821) at performUnitOfWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864) at workLoop (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903) at renderRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15943) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83) BlogPostTemplate @ D:/Projects/nicky-blog/src/templates/blog-post.js:37 BlogPostTemplate @ D:/Projects/nicky-blog/node_modules/react-hot-loader/dist/react-hot-loader.development.js:675 mountIndeterminateComponent @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13381 beginWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:13821 performUnitOfWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15864 workLoop @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15903 renderRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15943 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16561 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 The above error occurred in the component: in LocationProvider in Location in Router (created by Root) in Root (created by HotExportedRoot) in AppContainer (created by HotExportedRoot) in HotExportedRoot (at app.js:55)

Consider adding an error boundary to your tree to customize error handling behavior. Visit https://fb.me/react-error-boundaries to learn more about error boundaries. __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 __stack_frame_overlay_proxy_console__ @ D:/Projects/nicky-blog/node_modules/react-error-overlay/lib/index.js:2172 logCapturedError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14227 logError @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14266 update.callback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14919 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10879 commitUpdateQueue @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:10912 commitLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:14397 commitAllLifeCycles @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15463 callCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:100 invokeGuardedCallbackDev @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:138 invokeGuardedCallback @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187 commitRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604 completeRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619 performWorkOnRoot @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564 performWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483 performSyncWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455 requestWork @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355 scheduleWork$1 @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219 enqueueSetState @ D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300 Component.setState @ D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270 JSONStore._this.handleMittEvent @ VM2178 json-store.js:46 (anonymous) @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 emit @ D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59 (anonymous) @ D:/Projects/nicky-blog/.cache/socketIo.js:65 r.emit @ index.js:83 r.onevent @ index.js:83 r.onpacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.ondecoded @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 a.add @ index.js:83 r.ondata @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 (anonymous) @ index.js:83 r.emit @ index.js:83 r.onPacket @ index.js:83 r.onData @ index.js:83 ws.onmessage @ index.js:83 D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:145 Uncaught Error: A cross-origin error was thrown. React doesn't have access to the actual error object in development. See https://fb.me/react-crossorigin-error for more information. at Object.invokeGuardedCallbackDev (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:145) at invokeGuardedCallback (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:187) at commitRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:15604) at completeRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16619) at performWorkOnRoot (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16564) at performWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16483) at performSyncWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16455) at requestWork (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16355) at scheduleWork$1 (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:16219) at Object.enqueueSetState (D:/Projects/nicky-blog/node_modules/react-dom/cjs/react-dom.development.js:11300) at ProxyComponent.Component.setState (D:/Projects/nicky-blog/node_modules/react/cjs/react.development.js:270) at JSONStore._this.handleMittEvent (VM2178 json-store.js:46) at eval (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at Array.map () at Object.emit (D:/Projects/nicky-blog/node_modules/mitt/dist/mitt.es.js:59) at r.eval (D:/Projects/nicky-blog/.cache/socketIo.js:65) at r.emit (index.js:83) at r.onevent (index.js:83) at r.onpacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.ondecoded (index.js:83) at a. (index.js:83) at a.r.emit (index.js:83) at a.add (index.js:83) at r.ondata (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r. (index.js:83) at r.emit (index.js:83) at r.onPacket (index.js:83) at r.onData (index.js:83) at WebSocket.ws.onmessage (index.js:83)

Environment

  System:
    OS: Windows 10
    CPU: x64 Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz
  Binaries:
    Yarn: 1.7.0 - C:\Program Files (x86)\Yarn\bin\yarn.CMD
    npm: 6.1.0 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: 42.17134.1.0
  npmPackages:
    gatsby: ^2.0.0-beta.100 => 2.0.0-beta.100
    gatsby-image: next => 2.0.0-beta.7
    gatsby-plugin-catch-links: ^2.0.2-beta.8 => 2.0.2-beta.8
    gatsby-plugin-extract-schema: 0.0.4 => 0.0.4
    gatsby-plugin-google-analytics: ^2.0.0-beta.5 => 2.0.0-beta.5
    gatsby-plugin-manifest: ^2.0.2-beta.5 => 2.0.2-beta.5
    gatsby-plugin-netlify: ^2.0.0-beta.6 => 2.0.0-beta.6
    gatsby-plugin-netlify-cache: ^0.1.0 => 0.1.0
    gatsby-plugin-offline: ^2.0.0-beta.9 => 2.0.0-beta.9
    gatsby-plugin-react-helmet: next => 3.0.0-beta.4
    gatsby-plugin-remove-trailing-slashes: ^1.0.9 => 1.0.9
    gatsby-plugin-sharp: next => 2.0.0-beta.7
    gatsby-plugin-sitemap: ^2.0.0-beta.4 => 2.0.0-beta.4
    gatsby-plugin-styled-components: next => 3.0.0-beta.3
    gatsby-plugin-typography: next => 2.2.0-beta.3
    gatsby-remark-autolink-headers: ^2.0.0-beta.5 => 2.0.0-beta.5
    gatsby-remark-copy-linked-files: next => 2.0.0-beta.3
    gatsby-remark-images: ^2.0.1-beta.10 => 2.0.1-beta.10
    gatsby-remark-prismjs: next => 3.0.0-beta.5
    gatsby-source-filesystem: next => 2.0.1-beta.10
    gatsby-transformer-remark: ^2.1.1-beta.6 => 2.1.1-beta.6
    gatsby-transformer-sharp: ^2.1.1-beta.7 => 2.1.1-beta.7

File contents (if changed)

gatsby-config.js:

module.exports = {
  siteMetadata: {
    title: 'Nicky blogs',
    siteUrl: 'https://nickymeuleman.netlify.com',
  },
  plugins: [
    'gatsby-plugin-react-helmet',
    {
      resolve: `gatsby-source-filesystem`,
      options: {
        name: `pages`,
        path: `${__dirname}/src/pages/`,
      },
    },
    `gatsby-transformer-sharp`,
    `gatsby-plugin-sharp`,
    {
      resolve: `gatsby-transformer-remark`,
      options: {
        plugins: [
          {
            resolve: `gatsby-remark-images`,
            options: {
              maxWidth: 590,
              linkImagesToOriginal: false,
            },
          },
          {
            resolve: `gatsby-remark-prismjs`,
            options: {
              classPrefix: 'language-',
              inlineCodeMarker: null,
              aliases: {},
            },
          },
          'gatsby-remark-copy-linked-files',
          `gatsby-remark-autolink-headers`,
        ],
      },
    },
    `gatsby-plugin-catch-links`,
    `gatsby-plugin-styled-components`,
    {
      resolve: `gatsby-plugin-typography`,
      options: {
        pathToConfigModule: `src/utils/typography.js`,
        omitGoogleFont: true,
      },
    },
    {
      resolve: `gatsby-plugin-manifest`,
      options: {
        name: 'Nicky Meuleman',
        short_name: 'NickyM',
        start_url: '/',
        background_color: '#f5f5f5',
        theme_color: '#155799',
        display: 'minimal-ui',
        icon: 'static/favicon.svg',
      },
    },
    'gatsby-plugin-offline',
    {
      resolve: `gatsby-plugin-sitemap`,
    },
    {
      resolve: `gatsby-plugin-google-analytics`,
      options: {
        trackingId: 'UA-117805994-1',
        head: false,
        anonymize: true,
        respectDNT: true,
      },
    },
    `gatsby-plugin-remove-trailing-slashes`,
    'gatsby-plugin-netlify-cache',
    'gatsby-plugin-extract-schema',
    'gatsby-plugin-netlify', // keep as last in array
  ],
};

package.json:

{
  "name": "nicky-blog",
  "description": "Nicky tries to blog",
  "version": "0.2.0",
  "author": "Nicky Meuleman",
  "repository": {
    "type": "git",
    "url": "https://github.com/NickyMeuleman/nicky-blog.git"
  },
  "bugs": {
    "url": "https://github.com/NickyMeuleman/nicky-blog/issues"
  },
  "keywords": [
    "blog",
    "gatsby",
    "web development"
  ],
  "homepage": "https://nickymeuleman.netlify.com/",
  "dependencies": {
    "babel-plugin-styled-components": "^1.5.1",
    "gatsby": "^2.0.0-beta.100",
    "gatsby-image": "next",
    "gatsby-plugin-catch-links": "^2.0.2-beta.8",
    "gatsby-plugin-extract-schema": "0.0.4",
    "gatsby-plugin-google-analytics": "^2.0.0-beta.5",
    "gatsby-plugin-manifest": "^2.0.2-beta.5",
    "gatsby-plugin-netlify": "^2.0.0-beta.6",
    "gatsby-plugin-netlify-cache": "^0.1.0",
    "gatsby-plugin-offline": "^2.0.0-beta.9",
    "gatsby-plugin-react-helmet": "next",
    "gatsby-plugin-sharp": "next",
    "gatsby-plugin-sitemap": "^2.0.0-beta.4",
    "gatsby-plugin-styled-components": "next",
    "gatsby-plugin-typography": "next",
    "gatsby-remark-autolink-headers": "^2.0.0-beta.5",
    "gatsby-remark-copy-linked-files": "next",
    "gatsby-remark-images": "^2.0.1-beta.10",
    "gatsby-remark-prismjs": "next",
    "gatsby-source-filesystem": "next",
    "gatsby-transformer-remark": "^2.1.1-beta.6",
    "gatsby-transformer-sharp": "^2.1.1-beta.7",
    "prismjs": "^1.15.0",
    "react": "^16.4.2",
    "react-dom": "^16.4.2",
    "react-helmet": "^5.2.0",
    "react-typography": "^0.16.13",
    "styled-components": "^3.4.2",
    "typed.js": "^2.0.9",
    "typeface-roboto": "0.0.54",
    "typeface-roboto-slab": "0.0.54",
    "typography": "^0.16.17",
    "typography-breakpoint-constants": "^0.15.10",
    "typography-theme-ocean-beach": "^0.15.11"
  },
  "license": "GPL-3.0-or-later",
  "scripts": {
    "build": "gatsby build",
    "serve": "gatsby serve",
    "dev": "gatsby develop",
    "format": "prettier --write 'src/**/*.js'",
    "test": "echo \"Error: no test specified\" && exit 1",
    "commit": "commit"
  },
  "husky": {
    "hooks": {
      "pre-commit": "lint-staged",
      "commit-msg": "commitlint -e %HUSKY_GIT_PARAMS%"
    }
  },
  "lint-staged": {
    "*.{js,jsx}": [
      "eslint --fix",
      "git add"
    ],
    "*.{json,css}": [
      "prettier --write",
      "git add"
    ]
  },
  "devDependencies": {
    "@commitlint/cli": "^6.2.0",
    "@commitlint/config-conventional": "^6.1.3",
    "@commitlint/prompt-cli": "^6.1.3",
    "babel-eslint": "^8.2.5",
    "eslint": "^4.19.1",
    "eslint-config-airbnb": "^16.1.0",
    "eslint-config-prettier": "^2.10.0",
    "eslint-plugin-graphql": "^2.1.1",
    "eslint-plugin-import": "^2.14.0",
    "eslint-plugin-jsx-a11y": "^6.0.3",
    "eslint-plugin-prettier": "^2.6.0",
    "eslint-plugin-react": "^7.11.0",
    "gatsby-plugin-remove-trailing-slashes": "^1.0.9",
    "husky": "^1.0.0-rc.9",
    "lint-staged": "^7.2.2",
    "prettier": "^1.14.2"
  }
}

gatsby-node.js:

const path = require(`path`);
const { createFilePath } = require(`gatsby-source-filesystem`);

exports.onCreateNode = ({ node, getNode, actions }) => {
  const { createNodeField } = actions;
  if (node.internal.type === 'MarkdownRemark') {
    const slug = createFilePath({ node, getNode, basePath: 'pages' });
    createNodeField({
      node,
      name: 'slug',
      value: slug,
    });
  }
};

exports.createPages = ({ graphql, actions }) => {
  const { createPage } = actions;
  return new Promise((resolve, reject) => {
    graphql(
      `
        {
          allMarkdownRemark {
            edges {
              node {
                fields {
                  slug
                }
              }
            }
          }
        }
      `
    ).then(result => {
      result.data.allMarkdownRemark.edges.forEach(({ node }) => {
        createPage({
          path: `/blog${node.fields.slug}`,
          component: path.resolve('./src/templates/blog-post.js'),
          context: {
            slug: node.fields.slug,
          },
        });
      });
      resolve();
    });
  });
};

gatsby-browser.js: N/A
gatsby-ssr.js: N/A

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Source