Error in 7.8.0 Cannot read property 'split' of undefined

[bdwain]

Cannot read property 'split' of undefined
TypeError: Cannot read property 'split' of undefined
at test (....node_modules/eslint-plugin-react/lib/util/version.js:30:25)
at Object.testReactVersion (...node_modules/eslint-plugin-react/lib/util/version.js:39:10)

My eslint version is "4.19.1"
My node version is 9.11.1

[jsg2021]

Same with node 10.0.0 & eslint 4.19.1

[omarchehab98]

Same with node version 7 and node version 8 and eslint 4.19.1

[ghost]

Same w/ Node LTS, eslint@4.19.1, and npm@6.0.0

[ljharb]

Can anyone affected by this share their eslint config, and also more of the stack trace?

[taddei]

I think I found something. Might open a PR soon

[ljharb]

@taddei I have a fix already, I just need a regression test.

[taddei]

ok cool, np.
feel free to discard this: #1786

[taddei]

the hotfix is just a patch though. I noticed that it's trying to see if the method constructor is deprecated, should probably skip core class methods like this one?

[ljharb]

aha, thanks, that did it :-)

[bdwain]

thanks for fixing this so quickly!

[fcastilloec]

I'm still seeing this error when using eslint-plugin-react v7.8.2 with eslint v4.19.1, it supposed to have been fixed with v7.8.1. Here's the output I see:

[Error - 17:34:55] ESLint stack trace:
[Error - 17:34:55] TypeError: Cannot read property 'split' of undefined
    at test (.../node_modules/eslint-plugin-react/lib/util/version.js:30:24)
    at Object.testReactVersion (.../node_modules/eslint-plugin-react/lib/util/version.js:39:10)
    at isDeprecated (.../node_modules/eslint-plugin-react/lib/rules/no-deprecated.js:104:21)
    at checkDeprecation (.../node_modules/eslint-plugin-react/lib/rules/no-deprecated.js:109:12)
    at methods.forEach.method (.../node_modules/eslint-plugin-react/lib/rules/no-deprecated.js:162:35)
    at Array.forEach (native)
    at Object.checkLifeCycleMethods (.../node_modules/eslint-plugin-react/lib/rules/no-deprecated.js:162:17)
    at updatedRuleInstructions.(anonymous function) (.../node_modules/eslint-plugin-react/lib/util/Components.js:698:75)
    at listeners.(anonymous function).forEach.listener (.../node_modules/eslint/lib/util/safe-emitter.js:47:58)
    at Array.forEach (native)

[DylanVann]

This bug is in 7.12.3. Issue should be re-opened.

[ljharb]

@DylanVann instead, a new issue should be filed - but luckily #2131 was filed and fixed already, and will be included in the next release.

[DylanVann]

@ljharb Awesome, and it has a test too 😄 . Thank you for letting me know