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Fix Duplicate(Alias|Union)Arg error message#100

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pithub wants to merge 1 commit into
lamdera-nextfrom
error-message-fix
Open

Fix Duplicate(Alias|Union)Arg error message#100
pithub wants to merge 1 commit into
lamdera-nextfrom
error-message-fix

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@pithub

@pithub pithub commented Jun 4, 2026

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Fixes the error message for code like

type T a a = T
type alias T a a = List a

See #2012 and #2015 from the Elm compiler repository.

@miniBill

miniBill commented Jun 4, 2026

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Could we add a test for this?

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