CMS crashes on rich text formatting option selection

[josevh]

- Do you want to request a feature or report a bug?
bug

- What is the current behavior?
Editor crashes. Message:

Sorry! There's been an error - please report it!

- If the current behavior is a bug, please provide the steps to reproduce.

1. In /admin, click button for new post
2. Before typing anything in markdown widget, click H1 twice
   • Also crashes with: H2, and the quote icon with same steps.

- What is the expected behavior?
Affected button should toggle on and off.

- Please mention your CMS, node.js, and operating system version.

• Netlify CMS: 1.0.3
• Node v8.9.3 (npm v5.5.1)
• Firefox: 58.0b12 (64-bit)
• Chrome: 63.0.3239.84

Netlify CMS version 1.0.3     index.js:20
Error: Invalid `key` argument! It must be a key string, but you passed: null     react-dom.production.min.js:164:440
Stack trace:
o@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:82754
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:89536
h/e[t]@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:180037
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:95647
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:1608228
s@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:710533
beginWork@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:714940
o@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:718856
a@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:719177
l@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:719415
E@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:722949
_@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:722686
batchedUpdates@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:732226
Z@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:693321
Se@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:697215


Error: Invalid `key` argument! It must be a key string, but you passed: null     ErrorBoundary.js:27:4
Stack trace:
o@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:82754
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:89536
h/e[t]@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:180037
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:95647
value@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:1608228
s@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:710533
beginWork@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:714940
o@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:718856
a@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:719177
l@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:719415
E@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:722949
_@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:722686
batchedUpdates@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:732226
Z@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:693321
Se@https://unpkg.com/netlify-cms@%5E1.0.0/dist/cms.js:1:697215

[prateepgedupudi]

Same for me. I am getting the same error when I click on markdown widget editor.

[tech4him1]

I believe this was fixed in #955, which will be in the next release. Can you try reproducing on the CMS Demo site, since it already has the fix?

[josevh]

@tech4him1 You're right it is fixed, I cannot reproduce the issue on the demo site. I'll close this.