title: Can't identify the source of "Uncaught TypeError: t.apply is not a function" in React app
body: <p>I just started getting this error in my production app built with create-react-app and I can't figure out where it might be coming from:</p>
  <pre><code>Uncaught TypeError: t.apply is not a function
   at Object.ze (react-dom.production.min.js:54:317)
   at Ue (react-dom.production.min.js:54:471)
   at react-dom.production.min.js:55:35
   at Lr (react-dom.production.min.js:105:68)
   at zr (react-dom.production.min.js:106:380)
   at react-dom.production.min.js:117:104
   at as (react-dom.production.min.js:273:42)
   at je (react-dom.production.min.js:52:375)
   at Ur (react-dom.production.min.js:109:469)
   at Qt (react-dom.production.min.js:74:59)
  </code></pre>
  <p>It fires for some reason when I click on any of the input fields in one of my components. It doesn't crash the UI, just quietly shows up in the console. What would be the best practices for identifying the source of an error like this?</p>