Cannot read property 'version' of undefined at Object.getScriptVersion

[johnjayhopley]

🐛 Bug Report

Updated to npm version 25.5.1 but i am still getting the following error - only on a windows build server

● Test suite failed to run

TypeError: Cannot read property 'version' of undefined

  at Object.getScriptVersion (node_modules/ts-jest/dist/compiler/language-service.js:85:68)

Npm packages:
jest:
ts-jest:
typescript:
babel(optional):

[ahnpnl]

duplicate #1639

[thehappybug]

I'm blocked on this issue and might not be able to update for some time to the latest ts-jest version (due to other dependencies). Is there a workaround for this issue that I can apply to my code? Do we know the cause of this issue?

[ahnpnl]

@thehappybug there are 2 workarounds:

• Either Use isolatedModules: true in combination with tsc --noEmit .

• Or always run tests without cache in case of not using isolatedModules: true

• Or just upgrade ts-jest to 26 (should work with jest 25) and disable version warning message via environment variable, see https://kulshekhar.github.io/ts-jest/user/config/#version-checking

[thehappybug]

Thank you. This worked for me. I've enabled isolated modules and used it with tsc --noEmit.

[anku580]

I faced the same issue. I was using v25.0.0 but after updating it to v26.0.0 the issue got fixed.

Thank you @ahnpnl