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While I'm writing JSX PPX V4, I tried to verify that V4 will not break a large existing application. So, I ran it on some projects and encountered some errors which seem not related to V4, I guess.
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Attributes not allowed here
I'm not sure what causes this error. I've looked for the error msg in the compiler, but no gain. -
Multiple definition of the type
It was fine in V9, but I found this is not allowed anymore in V10. It could break the existing projects, I guess.module NonEmpty = { include Belt.Array type t<'a> = array<'a> // error! }
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Not a valid global name
I think this kind of issue goes to each submodule, but it may cause breaking. Maybe it could be documented as some sort of migration plan for open source maintainers.external formatISO: Js.Date.t => string = "date-fns/formatISO";
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