L5 An uploaded file must be an array or an instance of UploadedFile

i got this error when submitting a form whit a file input;

i'm using latest Laravel commit

Level 5

I've got the same error, did you find something to fix it?

Only happens when input file is empty when posted.

Level 8

Yup, it's a known issue. Hopefully it will be fixed soon.

Level 1

I've posted how to apply suggested fixes:

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