babel: [Bug]: TypeError: Cannot set properties of undefined (setting 'kind')
💻
- Would you like to work on a fix?
How are you using Babel?
Other (Next.js, Gatsby, vue-cli, …)
Input code
Seeing the error:
Cannot set properties of undefined (setting 'kind')
Seems related to https://github.com/babel/babel/issues/15300 and
Configuration file name
No response
Configuration
No response
Current and expected behavior
After release @babel/plugin-transform-block-scoping v7.20.8 seeing the error above.
Environment
System: OS: macOS 12.6.1 Binaries: Node: 16.16.0 - ~/.nvm/versions/node/v16.16.0/bin/node Yarn: 1.22.19 - ~/.nvm/versions/node/v16.16.0/bin/yarn npm: 8.11.0 - ~/.nvm/versions/node/v16.16.0/bin/npm
Possible solution
Does https://github.com/babel/babel/pull/15200 need to be reverted until the issues are all fixed?
Additional context
No response
About this issue
- Original URL
- State: closed
- Created 2 years ago
- Reactions: 7
- Comments: 20 (6 by maintainers)
I went back a version for @babel/plugin-transform-block-scoping and my react application is now building successfully again.
npm i @babel/plugin-transform-block-scoping@7.20.5We are also experiencing a similar issue for a react-app with the following versions:
The earlier error was
TypeError: 'constantViolations' of undefinedhowever now it’sTypeError: Cannot set property 'kind' of undefined. Since our project is working on an old package version so we wanted to be sure whether it’s a deprecation of babel dependency that we are using or something else. Kindly provide an update on this.I’m also a bit hesitant to ask… but would a roll-back to
7.20.5be an option? Meaning releasing a new patch with the contents of7.20.5?I could provide a environment, in which you can replace some
node_modulescontent and a command to run to reproduce the problem in “isolation”…Maybe in the second one we could run a crawl if the binding is not present.
A fix would be checking that every call to
scope.getOwnBindingin https://github.com/babel/babel/tree/main/packages/babel-plugin-transform-block-scoping/src can returnnull. I can probably work on a PR in a few hours, tomorrow morning (EU) at latest, but if someone else wants to open the PR it would be much appreciated.