fix(ReactFiberCommitEffects): cannot read properties of undefined (reading 'tag')

[emerson-paiva]

Summary

• ⚠️ I don't know exactly how to reproduce the bug, my only evidence that this problem exists is my error logs.
• It looks like the fiber tree hits the end and we are not checking this
• Versions that my application uses [email protected] and [email protected].
• I got some logs from my application with the following stack trace, it was caught 4 times until now from my ErrorBoundary.

  | Attributes.metadata.stack.0 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:7481:0
  | Attributes.metadata.stack.1 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8940:0
  | Attributes.metadata.stack.2 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8915:0
  | Attributes.metadata.stack.3 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:9034:0
  | Attributes.metadata.stack.4 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8915:0
  | Attributes.metadata.stack.5 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:9034:0
  | Attributes.metadata.stack.6 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8915:0
  | Attributes.metadata.stack.7 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8934:0
  | Attributes.metadata.stack.8 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8915:0
  | Attributes.metadata.stack.9 | webpack://_N_E/node_modules/react-dom/cjs/react-dom-client.production.js:8934:0

After checking the react code base, and the code generated from the react-dom-client.production version, I made the change on the lastEffect.next to ensure that it will have a value before enter the do while.

How did you test this change?

I did the following steps:

• I ran the yarn test command
• I ran the yarn test --prod command
• I ran the yarn linc command