@jsx pragma broken in latest versions of babel-loader & @babel/core

[MartinSoderholm]

I'm submitting a bug report

Webpack Version:
5.66.0

Babel Core Version:
7.16.10

Babel Loader Version:
8.2.3

Please tell us about your environment:
macOS 12.1
node.js 16.9.0

Current behavior:
/** @jsx jsxCreateModel */ pragma is ignored and transpiled code has React.createElement(.... Error React is not defined is thrown.

Expected/desired behavior:
/** @jsx jsxCreateModel */ pragma should result in transpiled code with my custom method jsxCreateModel(....

If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem along with a gist/jsbin of your webpack configuration.

I tried downgrading various packages, and to get it working I had to revert to @babel/core 7.15.5 and babel-loader 8.2.2. Only upgrading core to 7.16.0 breaks it. Only upgrading the loader to 8.2.3 breaks it. Upgrading both of them breaks it.

[babel-bot]

Hey @MartinSoderholm! We really appreciate you taking the time to report an issue. The collaborators on this project attempt to help as many people as possible, but we're a limited number of volunteers, so it's possible this won't be addressed swiftly.

If you need any help, or just have general Babel or JavaScript questions, we have a vibrant Slack community that typically always has someone willing to help. You can sign-up here for an invite.

[JLHwung]

I can't reproduce this issue. Are you sure the pragma comment is /** @jsx jsxCreateModel */? In #14012 we limits the @jsx pragma comment, i.e. /** some thing @jsx jsxCreateModel */ is not allowed. But /** @jsx jsxCreateModel */ is still supported.

[MartinSoderholm]

I was about to say “Yes, I'm sure”, but then I checked and apparently it was /** @jsx jsxCreateModel **/, for some reason.

So I guess the ending **/ is no longer supported 😊.

Thanks for your help 👍

[nicolo-ribaudo]

Uh well, we should probably add it back since it doesn't seem too uncommon (especially because multiline dockblock comments end with **/).