Repository: create-react-app
Issue: new react apps state is undefined on class based component without a constructor
Labels: needs triage,issue: bug report

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### Describe the bug

Using state on a class based component without a constructor and creating methods will not compile because they are undefined. Using the EXACT same code in a react app I created over the weekend, it compiles and runs fine. Trying to create a new react app via 'npx create-react-app <projectname>' will not compile.

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Yes I tried removing node_modules and creating new react apps via 'npx create-react-app test' numerous times

### Which terms did you search for in User Guide?

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State undefined class based component

### Environment

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  `npx create-react-app --info`

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It was not copies to my clipboard directly so heres my copy paste:
Environment Info:

  current version of create-react-app: 4.0.3
  running from /Users/joseph/.npm/_npx/c67e74de0542c87c/node_modules/create-react-app

  System:
    OS: macOS 11.1
    CPU: (8) x64 Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
  Binaries:
    Node: 14.15.4 - ~/.nvm/versions/node/v14.15.4/bin/node
    Yarn: Not Found
    npm: 7.5.6 - ~/.nvm/versions/node/v14.15.4/bin/npm
  Browsers:
    Chrome: 88.0.4324.192
    Edge: Not Found
    Firefox: 85.0.2
    Safari: 14.0.2
  npmPackages:
    react: ^17.0.1 => 17.0.1 
    react-dom: ^17.0.1 => 17.0.1 
    react-scripts: 4.0.3 => 4.0.3 
  npmGlobalPackages:
    create-react-app: Not Found


### Steps to reproduce

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(Write your steps here:)

1. npx create-react-app test
2. create a class based component
3. initialize state without the use of a constructor or write an arrow function.

### Expected behavior

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State would be initialized and my app would compile

### Actual behavior

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state is undefined. method is undefined.
[screenshot](https://imgur.com/U6zGUDQ)


### Reproducible demo

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I do not have the time at the moment to upload a link to a project. I will try to get a repo up soon if you need

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